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CO AL AGEW ith Which is Consolidated

The Colliery Engineer >3 7 5 /2^/INDEX TO VOLUME XXV

January 1 to June 30, 1924

NOTE— T h e a rtic les and references in th is index hav e been classified under leading sub- jec ts o r topios, as f a r as p racticab le, and should be sough t under such heads, w hich together w ith a ll unclassified m a tte r are arranged alpha- betically . I llu s tra te d artic les or cu ts standing by them selyes are ind icated by an as te risk (* ) . A ll ed ito ria ls ap pear under th a t subject, each h av in g its exact title . E lsew here the subject m a tte r of an ed ito ria l w ill be found classified and m arked (e ) . M any title s of artic les are abbrev iated , th e aim being to give prom inence to im p o rtan t worls.

Follow ing is a list of the pages included in each issue of th e volum e, together w ith datc and num ber of th e issue, fo r convenience of re fe ren ce :

No. P p .Ja n . 3, 1 ................................................. 1 - 3 2

10. 2 .............................................. 3 3 - 6 117, 3 .............................................. 65-12424, 4 .............................................. 125-16U31, 5 .............................................. 161-194

F eb . 7. 6 ................................................ 195-23014, 7 .............................................. 231-26621, 8 .............................................. 267-30228, 9 .............................................. 303-340

M arch 6 , 10 ................................................. 341-37613, 11 .............................................. 377-41220, 12 .............................................. 413-448

" 27, 13 ................................................ 449-482A pril 3, 14 ................................................ 483-518

10, 15 .............................................. 519-55417, 16 .............................................. 555-59024, 17 .............................................. 591-624

M ay 1, 18 ................................................ 625-6608 , 19 .............................................. 661-712

15, 20 .............................................. 713-75022, 21 ................................... . . . 751-794

29, 22 .............................................. 795-828Ju n e 5, 23 ................................................ 829-864

12, 24 .............................................. 865-89819, 25 .............................................. 899-93226, 26 .............................................. 933-968

PageA ccidents See also “F a ta litie s ,” “Ex-

plosions, M ine.”— Add fo u r per cent to operating co s t. . . . 388— English vs. Am erican coal m in es............... 388— Coal-mine accidents in Grt. B r ita in . . . . 427— F ata l accident narrow ly av e rted ...............*182— F orum w ith Safety Council to reduce ac

cidents .............................................................. 323— Low est ra te . P e n n ............................................ 388— M iner lost in Zeigler No. 1 m in e ............ 361— M t. Jessup d isaster, P re cau tions sug-— R ates in foreign c o u n tr ie s ......................... 43

gested by ( e ) ....................................... 125, 146— C lassification of tim e lo st by accidents;

table ........................................... . ^ iibi s. . . . 528— 'Glen Alden m ines flooded ................. : . . . 576— -Percentage due to d if fe re n t^ a u s e s ............ 632— N ational m ine, Glen\. A laen Coal Co.,

flooded .................... .............................V? •— D eaths in A pril in coal m inesi, tab iey ,.. 920— Old men m ore subject to acciden ts.......... 941— Group classification o f accidents: tab le 942— A cid-resisting v a lv e ..........................................*776Aezol fo r preserving m ine tim b e r ................. *yxA labam a— Corona Coal Co. files a p p ea ls ....................— New coal ra te s .................................. _............. 61— Dem and fo r com m ercial coal declined . . . *102 — Prices. R angę of, 1923. tab le : M t. 01ive

dist.. St. Louis m arket, ta b le ............... 103— Convict lab o r m u tin y ....................................... 115— Coal. Class o f ................................................. 171— Revised L . & N. R.R. ra tes , effective

M ar. 1 ............................................................... 299— • W eight loss, Consignee m u st b e a r ............ 337— T h eft o f federal coal rese rv es..........363. 470— D eepw ater C. & I . Co. buys m ore coal

lands .......................................... ...................... 468

— Coal o u tp u t. R ap id increase i n ............... 109— A laskan E ngineering Comm. u rge R .R .

extensions ...................................................... 209— Chickaloon m ine operated by A laska

R .R ....................................................................... 245— Coal leases, Senate to ap p ro v e .................... 286— T ransfe r of coal lands from N avy to In

te rio r D ep t....................................................... 327Alem ite lu b rica tin g system fo r rod bear-

ings ........................................................................*711A llow able sweep in wood poles: t a b l e . . . . 766 A m ortiza tion claim allowed Berwind-W hite

C. M. Co................................................................ 542A nalvses~ V a l l e y field coal, V a.; ta b le ......................... 270 Mine w ater: t a b l e ............................................. 365„__ M ine a ir re tu rn from flre; ta b le s ............ 382 Coal fo r c linkering te m p e ra tu re s ............ 401.__ Coal. Lethbridere, C anada: ta b le .............. 461..__B eckley coal, W. V a.; ta b le ........................ 485

^ ? R a te ° h e a r in g s , A ll-rail, W. V a. to NewEngland .......................................................... 29

W elsh an th rac ite , S u p e n o n ty o f ............ 47 P u b lic ity o f coal eo .’s accounts a s k e d .. . 52

PageA nthracite— Continued— Prices fo r eleven years; d iag ram ................ *75— Sales decrease ................................................ 144— E x h ib it a t W ashington ............................. 147— C lassification .................................................... 170— B urning an th rac ite dust, New furnace

fo r .....................................................................*175— Clean coal, General h igh standard (e) . . 195 — Ash in com m ercial a n th ra c ite : ta b le . . . . 272 — R etail dealers stocks; P roduction and de-

li\neries .......................................................... 327— Solutions of problem s suggested (e) . . . 377 — Sm ali sizes, Best furnace for burn ing . . *389— Safer and more economical than o i l . . . . 398— Smali sizes, Raise standard in prepara-

tion of (e) ................................................. 413— Irresponsible dealers harm an thracite

trade (e) ....................................................... 449— 'New England dealers assail quality of

coal .................................................................. 471— A nthracite dust can be exploded; W heeler 490— Domestic use of sm ali sizes ...................... 568— M aking fine sizes m ore sa lab le ....................*673— S outh W ales coal fie lds............................. *726— O perators nam e Advisory com ................... 734— A ttack s an th rac ite t a x ................................ 736— Gas an active riva l of an th rac ite ; Car-

pen ter ............................................................. 766— Surplus of fine coal. E fforts to reduce

(e) ..................................................................... 796— V ariations in quality , Effect of (e) . . 900 — At w hat h ea t was an th rac ite fo rm e d ... 906 A nti-fric tion bearings low er transpo rta tion

costs; K neeland ...............................................*603A rkansas— Coal, Class o f ...................................................... 171A sh in coal, F usib ility of (e) .................... 661— Ash in road dust lessens d an g e r................. 686As o thers see u s ................................................... 725A ssociations— A .I.M .E ., A nnual m eeting, 14 4 : A utum n,

249; R eport of annual m eeting, 320; In d u str ia l re la tions com., 350, 388;P rogram , 248 ; R eport ........................... 321

— A .I.E .E ., B irm ingham m eeting, 320; Le-h ig h section ................................................. 611

— Amer. Mg. Congress, Officers andspeakers .................................. ...................*676-7

— Amer. Hardw ood Inst., To com pile data . 778 — Amer. Ry. Assc., New quarters Car-Serv-

ice Div., 263; Seek Fuel-Research Bu-reau ................................................................ 608

— Amer. W holesale Coal Assc., S tudy oil com petition, 696; P lans convention,644; A nnual convention, 738; UrgesCoal I n s t ...........................................................*880

— Amer. W elding Socy...................................... I7 x— A rm y Ordnance Assc., E ngrs. study w ar

problem s ........................................................ 252— Coal Mg. In st. o f America, D iscussions.. 243 — English Co-op. W holesale Socy., 282;

O perates own colliery ........................... 283— Fed. T rade Comm., H u n t succeeds Mur-

dock ................................................................ 85S— H am pton Roads Coal A ssc............................. 373— 111. Mg. In st., Three-day outing . 917;

Tech. sessions ............................................ *9411— In st. fo r G ovt. Research u rges abolishing

B ureau of Mines ..................................... 141— Ky.-Tenn. Coal O perato rs’ Assc. sign

open-shop p a c t ............................................... 502— Mine Insp . In st. of America, P rogram ,

608: A nnual m e e t in g ................................ 80'/— M ine-Safety Assc. organized in P a ......... 248— N atl. Coal Assc. (See also “B ureau of

Coal Eeonom ics” ). No coal d ic ta to r em ployed: C om m ittees appointed, 110; S tream pollu tion bills. 217; Com. to s tu d y Oddie bill fo r Dept. of Mines.219; Com. to arrange convention, 286;To m eet in C incinnati. 363. 397: Two 111. o pera to rs back. 611: P rogram fo r m eeting, 697; E lects president, 770;W eil know n in W ashington, 781; W ho’sw ho in vo ting streng th ......................... 782

— N atl. In d u str ia l Conference B o a rd ......... 362— N atl. R e ta il Coal M ch’s. A ssc.: P lea to

abolish Govt. fuel yard, 49 : M idwest re ta ile rs not to w ithdraw . 113; Urge co-op. coal In st., 219: C onvention . . . . *883

— N atl. Safety Council to m e e t................. 604-H N ew E ngland Coal D ealers Assc., A nnual

convention .................................................... 471— N orthw estern Traffic and Seryice B ureau, 578— Penn. R et. Coal M chs. Assc. scan trade

problem s . ; ............................................ 850— P ittsb u rg h Coal ‘P ro d u cers A ssc ............ 249— Rocky M t. Coal Mg. In s t. m ee tin g ......... 328— Texas R et. Coal D ealers Assc. u rges sum-

m er buying ................................................. 849— Trade associations, V arious ...................... 613— U. S. Coal Comm., R eport to be prin ted , 850— U. S. Shipping Board opens b id s ............ 738— U nited Eng. Socy., E lection of officers,

e tc ......................................................................... 218— W ashington Acad. of Sciences. Discussion 145— W. Va. Coal Assc. re-elects officers.......... 782— W. Va. In st. to discuss s tra y curren ts,

etc., 814; Discusses sa fe ty m easures.949, 954

A ustra lia— Strikes to force governm ent ow nership of

m ines ............................................................... 323

Balanced m ines should have rock-bottoncosts; Anderson ............................................... 637

B allistic m o rta r t e s t s .......................................... 668Barrages versus coating system ...................... 907B arricade saves lives, F ro n tie r mine, Wyo.

*150, 242B arrier, “Old Ben” concentrated stone-dust..*687 ‘ B attle axe coal” an i Dempsey ( c ) . . . 3 7 8 , 398 Bearings— A nti-fric tion ro lle r b e a rin g s ...................... *603— Bali bearings on mine cars; Locom otive

drive sh a ft ................................................... *605— Conveyor belt operated on ro lle r bear

ings .................................................................. *606Belt splices, Direction to r u n .........................*922Bids (Coal)— N avy asks bids, 51; Opens bids, 144;

Seeks bids for year’s su p p ly ............... 698— New Y ork City seeks bids. 504: Coal

com p’s. subm it bids, 578; School bidsopened ............................................................. 610

— U .S. Shipping Board opens bids in N. Y., 608, 738: N arrow rangę of bids.778: Opens more bids. 812; Keen com petition, 813; More bids opened. 882; Contracts aw arded on secont1 b ids. . . . 852

— 'Govt. Fuel Y ard seeks b i d s ........................ 73S— B ureau of Mines opens b id s ........................ 852Blasting. See also “E xplosives.”— Best m ethods of shoo ting c o a l; Good

tam ping affords sa fe ty : B reaker shot the heav iest: A ir cushions ad v isab le . . *646

— Dry b a tte ry a menace in b la s tin g ............ 184— Fuses th a t cannot be unduly sho rtened . . 323 — P roper a ir spaces in ch a r6m g noles. . . . *255 — Rock-dust stem m ing quenches f l a m e .. .* 8 0 5 — Reoomm endations by Mine Inspec. In s t.. 807— Safety pow der f ia sk .....................................*230— Short fuses d angerous.................................. *291— -Water cartridge in b las tin g c o a l............ *50f>— W eight of single charge in G rt. B rita in . . 426— W hy shots explode p re m a tu re ly ................. 292Blowers, see “F an s and B low ers.”Boilers, Steam— Boiler-room instru m en t b o a rd ....................* 2 1 1— Boiler and pow er-house o p e ra tio n ............ 271— Control of com bustion: F lue gases, etc.

(Inq .) ............................................................. 22— U nderfeed stoker .............................................*26i>Boilers—L osses in ord inary o p era tio n ....................*389— Underfeed stoker w orks, How m o d ern .. *347 Book Notices— ‘ Governm ent Ownership of Coal M ines;”

Johnsen ........................................................... 171— -“ E lem ents of Storage B a tte ries ;” Jansky

and Wood .................................................... 236— “ Splices and T ap es;” Okonite Co., Pas-

saic, N. J ........................................................ 271— “Theory and T raction of Mine V entila-

tio n ;” Bryson ............................................... 804— “M iners’ W ages and Cost of C oa l;” L ubin 871Broadcasted program received in m ine.......... *358Brucelon Mine— G unite test in explosion .............................. 56— Mine-rescue signal system s in re s t ig a tio n . 139 Building Construction— tBuilding huge mine, Illino is Coal C orp. . . *535— In terio r view of b itum inous t ip p le ..........*764— Im proved Steel s ta ir t r e a d ............... .. .*7 9 4— M etal-cu tting to rch ..................................... *794— T herm al (111.) No. 4 tipple. Donk Bros.

C. & C. Co......................................................*93G— M anagem ent to fu rn ish d a ta fo r new

tipple ................................................................ 834Bulging stock room beggars its ow ner. . . . 757 B ureau of Coal Economics — D iagram s show ing percentage of fuli

tim e operation and causes of tim e lost in follow ing sta te s:Illino is .............................................................. 99Ind iana ........................................................... 99K entucky: H azard field: H arlan field.

89: N ortheastern field, 105; W esternfield .............................................................. 109

O hio: N orth and cen tral d is tric ts;Southern d istric t ................................... 88

P en n sy lv an ia : Central field : Somerset County, 90: P ittsb u rg h d is tric t;W estm oreland d istric t ......................... 97

Y irg in ia : So. A p p a la c h ia n ...................... 108W est V irg in ia : P o cah o n tas d is tr ic t:

T ug R iver d istric t, 92 : Cum berland- P iedm ont d is tr ic t; F a irm o n t region 93; W inding G ulf d is tr ic t: NewR iver field. 96 : K an aw h a d is tr ic t: L ogan d istric t, 102; Kenova-T racker d is tr ic t ................................... 105

— D iagram s show ing price rangę of coal 1913-1923. on m ark e ts , fo r coal m ined in follow ing sta te s:Illin o is : C entral field. 8 8 : Sou thern

field. 87: S tandard fields. 100; Mt.OUve d istric t .......................................... 101

In d ian a : Veins Nos. 4 & 5 .................... 89K entucky: E aste rn field, 9 7 ; W estern

field .............................................................. 99O hio: H ocking d is tr ic t, 106 ; P i t ts

b u rg h No. 8 d is tric t ........................... 98P en n sy lv a n ia : C am bria and Som erset

Counties. 91 : Clearfield d is tric t, 92; P ittsb u rg h d istric t ................................. 95

January-June, 1924 C O A L A G E

/»'. 1 ■ PageB ureau of Mines U. S. ;i*-~— A ppropriation9 bill pa ted ........................... 147— A pproyal of self-rescue dev ice..................... 420— A w ards coal con tracts t ........................... . * .956— B ureau of Mines and the" coal industry

(e) .......................................23/v— Dept. of Mines proposal not favo red . . . . Ib — D irector Bain tells needs of the b u re a u . 886 — Experim ental work, Mine-rescue aignal

system s ...................... .................................... 139— Hillm an Coal Co.’s offer to study me-

chanical loading ........................................ 644— Move to broaden b u reau ac tiv itie s .......... 469— New safety film .............................................. 250— Opens b id9 fo r eupply of c o a l ................... 852— Radio experim ental laboratory .................*803—-Recommended abolished; Senator Oddle

defends b u reau .......................................... 147— Record of 275 lives being saved by bar-

ricades against gas ............................... 242— Safety service w ork ...........................321, 323— Shake-up in B ureau of M ines................... 954—‘“ Smoke abatem ent,” Tech. paper No.

273, ju st published ........................ 422— T ests ąuality of an th rac ite deliveries in

M ass..................................................................... 272— T o investigate screenings p rob lem ........... 394B utler Bros. last dragline ................................. *836

C alifornia 0— Coal deposits, In v estig a tin g ............................ 21/5Canada „— -Alberta Coal Sales Act ( e ) .................... 2— A lberta coal o u tp u t gT O w s...................... 361— A lberta expecting troub le ...................... 644— A lberta m iners strike ...............................— A lberta seeks to fili the coal bins of

Canada: Geddes ............................... .. • • • • 867— B arre tt resigns, provisional prest. U. M.

W ......................................................................... 5°4— B ritish Columbia, 1923 o u tpu t, 252;

Gloomy outlook .................................... • • 3 - J— Cape Breton Island. Big coal develop-

m ent a t ....................; ...................................JfJJ— Coalm ont Collieries, Wilson tu n n e l....... 3oo— Coal ou tpu t, exports, im ports, consump-

tio n ; tab le ..................................... 780— Coal resources of Canada. by provinces;

tab le ................................................................. 867— Dominion m iners ra tify pact and re tu rn

to w ork ........................................................ 328— Lignite stripp ing in S askatchew an . . *87U— Lethbridge coal field developing rapidly;

T urner ..................................................*459— Mines a t Cardiff, and Pem bina, A lb erta .. *868— M iners w ant m ore p a y .................................. 397— N ova Scotia m iners reject wage agree-

m ent ........................ ....................................... 399— N ova Scotia, The union in (e) . . . . . . . . 449— N ova Scotia strike, 146; E nas; M iners

get increase ................................................... 284— Peace River canyon, F ind good coal in . . 1-29— Strike looms in A lberta .............................. 436— S trip p it a t Drum heller. A lberta . . . . . . *869 — Sydney mines. N. S., Longwall system in 948 — Y ancouver coal reserve said to be over-

estim ated ...................................................... 781— W elsh coal seeks Canada’s an th racite

m arket ............................................................ 882Car Dumps. K ickbacks, etc.— R otary dum ps fo r handling t r ip s ............ 86— R otary 2-car dum p and k ic k b a c k ............— G ravity-op^rated ro ta ry lum p ...................... 776C ar-ra ting o f m ines ............................................ 770Cars— Congo car m o v er................................................ *64— L arry-car service, M otors f o r ........................ *237— C ar body b u ilt of corrugated sheets. . . . 357— Standard ization in m ine cars ( e ) ............ 520— Bali bearings on m ine cars ........................ 605— W idely vary ing types in u s e ........................... 725—-Dump car, 15 tons, cu ts s trip -p it costs .* 7 2 8— Car-greasing m achinę. L in co ln .......................*772— L arge car fo r m achinę load ing .......................*775— A utom atic car coupling show ing p a r ts . .*777— M aking cars large and Iow fo r m achinę

loading ...........................................................— Grease cars w ith bicycle p u m p ..................... *8o4— Mine car eąuipped w ith one-piece drop

bottom ...................._........................................*932Cartridge. See “B lasting .”Cast iron— Chemical specifications undesirable, W hy. 1,89 Castlegate b las t due to contact of gas w ith

open ligh t ..............................................................*431Cement— Production of P o rtland cem ent ................... 185— R ockdust fo r b a rrie rs from cem ent p lan t 660— Cement th a t m atu res in 24 h r ..................... 727— Cement gun usel fo r rock dusting m ines 800Census tak in g ind ispensab le............................. 363Chain. Com pensated, flexible, silent S tee l.. *712Cham ber of Comemrce, U. S. to d iscuss. . . . 611C ham pionship fo r loading c o a l......................... 738Cincinnati Convention— P lans and m achinery exh ib it ................. 607— Officers and speakers ................................ *676-7— W hat is to be th e outcom e ( e ) ................... 751— New equipm ent show n: K neeland ............... *772Clearfield B itum inous Corp. B uilding. . . . *792 Cleveland convention, R epublican p la tfo rm ;

W ooton ................................................................. 916Closing down m ines (e) .................................... 79r.Coal. See also “A nalyses.”— Coal Sales, Short-line w ays of h and ling . *7— Com bustion. C ontro l o f ( in q .) ................................ 22— Binder fo r coal b r ią u e ts ............................................ 32— 'B urning coal, E qu iva len ts i n ............................... 22— O utpu t 1923 exceeded b u t once in peace

tim e (e) .................................................................. 65— “Wooden coal,” pressed saw dust b riquets. 112— Storage. E ngineers’ repo rt on c o a l........... 146— Classifying coal fo r buying. *107; Types

and classes. 168 ; G rad in g ....................... 170

Coal. See also “A nalysis”— Continued— Incom bustible yolatile m a tte r ...................... 160— Splint coal; Cannel coal, 168; W estern

s ta te s coal ................................................... 171— Pulverized coal burner, Trying o u t . . . . 184 — Investigate C alifornia coal d ep o sits . . . . 212 —-Soft coal stockpilcs near peak, 325; Dis-

tr ib u tio n by classes of consum ers;tab le ................................................................. *325

— Coal discovery in So. west A fric a .......... 327— Coal saves f ru it ............................................ 364— T heft of federal reserves in A la .............. 363— Restoring confidence in the industry (e ) . 378— Combustion in fu rnace ................................*390— A ppraisal of coal fields (e) ...................... 413— Analyses of coal; see “A nalyses.”— U nm arketable coal in seam, D eterm ining.*465— V olum etric test of c o a l............................. *465— Storage p lan in coal consum ption ............ 469—C rush coal to meet m arket needs; Kill-

m an ................................................................. *490— Oxidation cause of mine fires................... 509— F usib ility of ash, Effect of ( e ) ............... 661— Testing coarse-sized coal ............................. 568— Coal a fac to r in repara tions settlem ent;

W ooton .......................................................... 577— Composite charac ter of coal; tab le . . . . 634— Consumption drops ......................................... 64ż$— Low -tem perature carbonization of coal. . 732 — B itum inous coal loaded a t L ake E rie

po rts ; tab le ................................................. 734— Coal consum ption in pow er production

drops ............................................................... 738—fBituminous m arkets show little change. 741— Float-and-sink test by “D elatester” ..........*772— D issim ilar coals fire a t con tact su rface . . 841— Oil versus coal .............................................. 885— Consum ption and pow er o u tp u t d rop . . . 886 — T ransporta tion hearings a t W ashington. 641 — C ontracts aw arded fo r N. Y. In stitu tio n s 918 — C ontracts aw arded fo r N avy Y ards and

sta tions .......................................................... 920Coal Commission, U. S.— W ork of Comm. highly commended. . . . 110— W hat was accomplished ( e ) ................... 341—iDeductions on an th rac ite vary from

fac ts; P a rk e r ............................................. *493— P rin tin g report, Moses w eakening o n . . . . 540 Coal C utters. See also “E quipm ent.”— Arcwall coal cu tte r app roved ................. 660— U ndercutter a t w ork in H olland m ine. . .*699Coal In s titu te , Need of ( e ) ............................ 713Coal-Mine F ata lities— T abulated by sta tes and causes................. 18— Elec. & m echanical equipm ent increases

fa ta lities, B ain ........................................ 14 o— F ata lity ra tes decline, U. S..................... 18, 540— F ata lities in 1923, F e w e r ........................... 250— M onthly r e p o r t s ....................................... 364, 540Coal M ining. See also “M anagem ent, M ine.”— Merger of coal com panies in D l.............. 20—‘Am erican vs. E uropean m eth o d s............... *41— B ritish coal industry can learn from

Am erica ......................................................................... 47— M erger of coal com panies in O h io . . . . 49— M echanical loading, P rogress o f ............ *67— Engrineering progress 1 9 2 3 ........................ 77— Strikes and car shortages. Effect of (e) 126— Modernizing m ining p rac tice ...................... *131— Q uality in production, Certified (e) . . . . 162 — Merger, P ittsb u rg h Coal Co. tak es over

Reiss in terests 219 ................................ 362— M ergers only hope, “Consolidate” the

ery, 249 (e) ..................................................... 268— M aster m inds needed in coal industry . . 276 — Seeing things as m ining men see them . . 310— Coal-mining problem s, Carnegie In s t. will

study ................................................................ 315— E uropean and Am erican m ethods con-

trasted ............................................................. 320— W estern Ky. consolidation ......................... 327— P ittsb u rg h Coal Co. takes over Reiss in

terests ................................................................. 362— G ovem m ent ow nership and control (e) 753 — Keeping m ines free from dust, explosions 769— Refuse in coal, W hat to do w i th ............ 810— Coal industry aw akened to value of

p a in t; Brosky ............................................ *901Coal S torage— Storing soft coal, W hat to avoid w hen;

H oskin ................................................................ *840— D issim ilar coals fire a t con tact su rface . . 841 — Sum m er sto rage by ra ilroads to level coal

production ...................................................... *847Coal 8tripper uses ice-harvesters’ m e th o d ..* 4 l5 Coke and Coking— Byproduct coke fo r dom estic use, Advan-

tages o f ......................................................... 39— R ules fo r b u rn ing coke .............................. 40— Coke situa tion in F ran ce ........................ 105— B yproduct coke o u tp u t. Decline, 114;

N ew record 1923 ....................................... 218— Byproduct vs. beehive coke, M onthly

averages ............................................................ 114— E stim ated consum ption of coal in m fg.

of coke .......................................................... 114— Byproluct and beehive o u tp u ts 1913-

1923; Production by s ta tes; tab les . . 218— Byproduct coal reserves .................................. 326— H igh-pressure gas transm ission lines

(e) ...................................................................... 795Colorado— H um idifying m ine difficult ........................... *386— Castlegate m ine explosion . .395 , *431, 503— R aton m esa region ....................................... 630Commissary. Com pany ........................................ 573Com pensation, W orkm an’s — R evision of law s and co-operation

needed (e) ..................................................... 231— Savings in com pensation ............................ 322Compressed Air— Stone dusting by com pressed a i r .................*663— Weil balanced a ir com pressor......................*82S— D ust blower. Com pressed-air ......................*910Concrete— P recast concrete fo r lin ing s h a f t .............. *437— Wood vs. concrete fo r lin ing s h a f t .......... 492

Concrete— Continued— W ater pow er applied to b reak concrete. .*508— Reinforced concrete tip p le . . -m J - ............... *557— A rch, concrete, th rough fa u lt .................... *559— Stable, Concrete, underground ................. *561— Concreting sh a ft while hoisting con-

tinues; Powell ........................ ...................*61*/,Congo car m over .................................. ...................*64Congress w ants to do w hat is r ig h t b u t

looking fo r counsel ................................... 765Consolidation Coal Co. stock issu e ................. 397Conyenient coal house fo r m in e rs .............. *354Conversion of coal consum ers to storage

idea, W ooton .................................................... 469Converter, R otary, See “Equipm ent, Elec-

tr ic a l.”Conveyors. See also “T ransporta tion .”— Coal conveyors a t face, *201; L ateral

conveyor discharging onto main-lineconveyor, *202; Loading c a r ................. *203

— Long re tard ing conveyor, Coal R iverColls Co., W. Y a...........................................*235

— Conveyor system ..............................................*131— R oller bearings. Conveyor belt operatea

on ..................................................................... *606— Sectional portable, Rugged all-steel. . . *669— Low est cost w ith c o n v e y o rs ...................... 694— Low ering coal down hillside w ith least

b reakage; 0 ’Neale ..................................... *715— Belt conveyor, Beaded pan conveyor. . . . *717— R etarding conveyor ...............................................*718— Rope and b u tto n conveyor ................................ *719— Long conyeyors cause excessive b reak

age ...................................................................*765— Steam shovel and conveyor in stripp ing . *837Coolidge’8 coal p lank ............................................. 916Co-operative m arketing to relieve competi-

tion ; W ooton ................................................... 695Copper— Bending of copper ............................................... 331— Care in handling ............................................ 507— Cleating and supporting copper................. 545— “Copper sickness,” ............................. 254, 545— E xpansion and contraction , A llowing fo r 289 — -Tinning stranded copper beyond support 402 Corrosion in m ines. See “W ater.”Cost— A nti-friction bearings low er c o s ts ...................*603— Concreting shaft, Cost o f; ta b le .................. 612— Co-operation of m iners and operatora to

cu t cost ............................................................. 733— Cost-cutting, Suggestions fo r th e execu-

tive; Gealy ......................................................*678— Crushing and pulyerizing plant, Cost of;

tab le ..................................................................... 700— Crushing coal fo r m arket, Cost o f . . . . 490 — E stim ate of m odern equipped p lan t;

tab les .............................................................. 132— F acto rs producing wide rangę in cost of

production; W ing ..................... ................. 145— How "m ine balance” affects c o s ts ................... 637— Low cost of production vs. h igh cost of

operation (e) ............................................... 231— Low est cost w ith conveyors ...................... 694— M achinę cu ttin g in s tr ip m ine reduces

cost ........................................................................ *415— M idwest riv e r traffic reduces cost of 1 1 1 .

coal .................................................................. *246— M iners’ wages and cost of coal; Lubin,

Book review .................................................... 871— O perating cost inereased by accidents. . 388 — O perating different fan drives, per year;

tab le ................................................................. 725— Pow er costs, Diverse opinions o f ............... 632— R elation of cost of production to price

of c o a l ................................................................ 428— R epointing m achinę b its ......................................... 4— Stone d u stin g in B ritish m ines; table,

6 68 ; U. S .......................................................... 700— Transm ission of gas by pipę line, E sti

m ate of cost ................................................. 951— U niform cost accounting, N a t’l. parley 396 — Upkeep of loading m achinę per ton. Cost

of ........................................................................ 845— W ays of low ering mine costs and better-

ing coal ........................................................... 322Courts. See also ‘‘In te rs ta te Comm. Com.”— Ala. Suprem e Court ru les consignee to

bear w eight loss ......................................... 337— C ircuit co u rt a t W. Va. nolle prossed

indietm ents .................................. ...................... 919— Cleveland & W estern Coal Co. judgm ent

stands ................................................................ 882— Keeney, C. F ., tr ia l. 398; A cquitted . . . . 468 — R ecap ture clauses, T ran sp o rta tio n Act

susta ined .................................................................. 50— Striker. Com pany m ay evict .................... 470— U. S. Suprem e C ourt resto res allow ance

fo r board ing car doors ............................ 793Crane Creek mines, E quipm ent a t ...................*763

Deep hole d rilling by sectional ro d s ..........*614D eepw ater C. & I. Co. buys coal lan d in

A la ............................................................................. 468“ D elatester” ; F loat-and-sink tes t fo r coal. *772 D epartm ent of Mines— W hat would be its fu n c tio n .......................(e) 714D eterm ining unm arketab le coal in seam ;

Owens ...................................................................*465D octoring a sick industry . (e) 3 7 7 .............. 818Door on h au lage road, Self-acting m in e . . *898Dragline, B utler Bros. 1 8 9 0 ...............................*799D raw slate does no t p ro h ib it m echanical

loading ................................................................... 768Dr. W heeler explains wet coal d u st liab le

to explode. B rosky ........................................ *423D rills and D rilling— Drill fo r cu ttin g large circu lar holes in

sheet m etal .......................................................*482— Deep-hole d rilling by sectional r o d s . . . . *614— Elec. rock d rill and h am m e r..........................*518— Elec. type drill. General u t i l i ty ............... 624— K eeping rock drills f i t .......................*221. *253— "L ittle -G ian t” drill m ounted on portab le

post ......................................................................*773

4 C O A L A G E Vol. 25

D ry-land dredge precedes m odern sh o v e l... *798 D ust. See also "E xplosions, M inę,” and

“ Rock D usting .”— A nalyses of dust p ropagating explosion . 686 — Coal dust, R ate of deposition; d iag ram s. *666 — D angers of coal dust, To cope w ith . . . . 367 — D ust in m ine air, New sam pler invented 321— D ust in m ine explosions .........................(e) 934— D ust m enace in Colorado m ines. . . . . . . . *386— D ust preven tion in m ines ........................... 418— E xperim en ta tion w ith anim als b rea th ing

dust-laden a ir ............................................ 322— E xperim enta tion of d u st d a n g e r..........(e) 519— H arm fu l when b rea th ed ......................350. 417— Inflam m ability depends on fuel ra te s . . . 950 — H ydrogen in d u st cause of explosion . . . 573 — Road d u st less dangerous being h igh in

ash ..................................................................... 686— R educing q u an tity of d u s t vs. cleaning

m ine .........................................................(e) 713— Rock d u st in sho tho les lessens violence

and increases lum p coal. H orlick . . . 805 — Silica d u st no t alw ays eąually dangerous 417 — W et d u st s till liable to explode, *423;

W ater requ ired ............................................ 425

E arly coal stripp ing fu li of h eartb reak .Holmes ............................................................. *797

E dito ria ls— A fter w aiting six tho u san d y e a r s ............ 829— A gainst the day of r a in .............................. 267— A irtig h t com partm ents in th e coal in-

d u stry .............................................................. 450— Alex H ow at is n o t d e a d ................................ 484— Ali soft-coal m ines are pow der m aga-

zines . . .................................i ........................ 304— An excess of technical m e n .......................... 829— Are m ore hom es needed?........................... 899— Are you a m ud h o rse ? ................................ 752— Are you w atch ing fo r crop fire s? ............... 2— At Castle G ate ................................................. 450— Bad w ork never pays .......................... 555— B etter inspectional forces ........................... 232— B lack sheep in good fam ilies ................. 378— Can th e union fields com p ete? ................. 661— Can’t w in w ith poor c a rd s ........................... 231— Closing down m ines ....................................... 796— Coal dust “as is” .......................................... 519— Complete m echanization .............................. 196— “Consolidate.” they ery .............................. 268— C onsolidation o r b an k ru p tcy .................... 866— Conveyor in strip p in g .................................. 829— D efinitions .......................................................... 162— Doctoring a sick industry ........................... 377— Dressed up and now here to g o ................. 714— Econom y in tran .sportation ......................... 753— Energy or a tro p h y ....................................... 303— E very m an h as h is m ental tw is t ............ 413— Exam ple of the pow der com panies. . . . . 933— Fallen in the p it they d igged ...................... 866— F a u lts and m ining f ra c tu re s ...................... 866— F ine an th rac ite an in tru d e r ...................... 413— “F irs t ro b in ” is sam e ro b in ........................ 1— F o r a new e ra in s a fe ty .............................. 231— F rom the p a rtic u la r to th e g en e ra ł. . . . 378— G etting down to rea l business ................ 626— Give them a boost ..................................... 232— Give your shovels a fa ir t r i a l .................... 414— G uilding the pub lic’s cho ice ...................... 796— Handcuffed to precedent ................. .. 900— H ere if anyw here ............................................ 196— H oodlum ism ...................................................... 303— How Mr. Lewis favors m ach ines............... 161— How n o t to avoid taxes .............................. 625— Is i t absurd? .................................................... 795— Is th is the way a t your m in e? ................. 591— Is th is w hat w as m e a n t? .............................. 125— I t ’s all in the fe e d .......................................... 752— Jo b of gloom, A ............................................... 341— John Rex still ru les .................................... 268— Ju s t w h at is the outeom e ....................... 751— Keep goodwill w ith your n e ighbor.......... 829— Keep m oving .................................................... 125— L arger coal ...................................................... 662— Lesher, C. E.. resigns from Coal A ge. . . 33— L et th ere be peace .......................................... 195— L ig h t is lig h t ................................................. 341— Localism of consu lting eng ineers............... 413— M ake a scalę In h as tę and repent at

leisure ............ ................................................ 865— M aking of an th rac ite ................................... 900— M aking one p rosper w here tw o died be-

fo re .................................................................. 555— Man to m an ...................................................... 161— M arvelous or only in ev itab le? ................. 483— Men w ith the hoe .......................................... 752— M issions w orth supporting ......................... 713— More governm ent m onopoly ...................... 196— More pow er to h im — and le s s .................... 830— M r. Lewis, keep your seat ........................ 933— M uch a t l i ttle cost ........................................ 304— N arcotism ........................................................... 126— N ear w ay to oil and c o k e ........................... 449— N egative m inds ............................................... 829— New problem s in m erchand ising ................. 661— Npw use of trad e asso c ia tio n s .................... 231— Off the track .................................................... 520— On the kemping of good com pany ............ 195— O ur case likp t.hf* fa rm e r’s ....................... 933— O ur sh a tte red fa ith in w a te r ..................... 414— O ur lab o r exodu« ............................................ 556— Outside look ing in .......................................... 752— Passine: of thf* hand shove l........................... 126— P assing th e buck ...................... ................... 519— Prepa.ring an alibi .......................................... 33— Prices and the w agę c o n tra c t................... 342— P rice trend fo r year dow ngrade............... *66— Protectine ' th e b uyer ..................................... 2— Puttine- th e eagle on c o a l ........................... 162— Ouiet business boom resoonsible. e tc . . . *65— Rid m ines of convict lab o r ..................... 125— Rock dusfinsr vs. m ine cleaning ........... 713— Safe gas lim its ................................................. 714— S afety a m ajo r consideration ................... 342

PageE dito ria ls— Continued— Safety a t las t ......................... ....................... 625— Sane th ink ing on tra n sp o rta tio n ............... 1— Selling coal in k ilo w atts ........................... 555— Shall gas be m ade a t the m in es? ............ 933— Sim plification of sizes ................................ 830— Slow progress in s tandard iza tion ...... 520— Smali cars, Iow tonnage ............................. 34— Smali m ines have ad v an tag es.................... 450— T alk m ines, n o t politics ............................. 555— Telling the world ............................................ 591— T h at blind spot .............................................. 483— The g reater force .......................................... 713— “The w on’ts” ................................................... 161— Those bad boys of N ova S co tia . . . . . . . . . . 449— Those M assachusetts coal tests ............... 267— Time fo r Lewis to re tire ......................... 556— Tim e fo r new law s ...................................... 899— Too m any grocery s t o r e s .............................. 626— Too m uch m ine .............................................. 661— Union and non-union te rrito ry ................. 625— Union will learn, T h e ..................................... 303— W age standard iza tion .................................. 865— Walking- a round the b łock ........................ 662— We and they ................................................... 341— We have some heroes .................................. 378— W hat abo u t w estern K entucky? ............ 484— W hat h as happened to our coal d u s t? . . . 934— W hen the w rench fell .................................. 795— W here is the nationaliza tion no ise?. . . . 753— W ho will urge a Secretary of Mines ?. . . 33— W hy? .................................................................. 661— W hy leave field to contro l pow er com

panies? ............................................................. 591— W hy no t te lep h o n e? ....................................... 1— W hy should they com p la in ? ........................ 592— Why w ork in the dark ? ........................... 752— Wonder w hat F arring ton th inks ab o u t. . 519— W rong kind of publicity ............................. 899— You can ’t please everybody ........................ 865— Y our place in C incinnati ........................... 484E ducation and T rain ing— Education, O ver-rating the value o f . . . . 458 — T raining and education in accident pre-

yention ................................................. ._. . . *528Efficiency in a depressed m a rk e t............. f ( e) 752Efficiency in operation ................................... (e) 795E lectrical engineers discuss ways of saving

pow er to cu t m ining c o s ts ...........................*754E lectric ity— A lternating cu rren ts no t ra ted by m axi-

m a ..................................................................... 949— Dry b a tte ry , in b lasting , a m enace.......... 184— E lectric cu rren t explained by ven tilation

analogy ........................................................... 784— Elec. equivalents of 1 lb. w a te r ............ 183— E lectrical term s, E xplanation of fan in . *53— H azards in elec. in sta lla tio n s .................... 570— Indicating in strum en ts, d.c. and a .c ......... 482— In su la tion fo r m ine hangers, Composi-

tion of .......................................................... 439— M aking application of electricity safe.

Ilsley ................................................................*569— Oil c ircu it breaker, New a u to m a tic ..........*448— Renewal of fuses on transfo rm er cir-

eu its made sa fe r .......................................*439— Safety fuses in electrical m ach ines.......... 949— S tray cu rren ts de tonating explosives,

P reven ting ................................................... *239— S tray cu rren ts in m ines ................................ 814— Surges m ake a lte rn a tin g cu rren t dan

gerous 948— T haw frozen w ater pipes by e lec tric ity . *438— T esting fo r elec. c h a rg e ................................ 183— W att equ ivalen t8; Joule equivalents. . . . 149— W hen is e lectricity safe? ............................. 565E lectric lam ps— M axim um life, Use r ig h t yoltage to g e t.* 7 4 0 Elec. M achinery, O perating. See also

“ E quipm ent, E lec.”— A utom atic reclosing circu it b re a k e r . . . . *220— Breakdow ns, To m inim ize ........................... 5— Cleaning insulation from copper coils. . . 473— Control of substations from su rface . . . . *595— “ Copper sickness” ......................................... 254— D anger in Iow yoltage tran sfo rm er. . . . *148— Defective rh eo sta t causes arcing ............ 420— D eyeloping induction and synchronous

m otor .............................................................. *141— Dynam os and fa ilu re to e x c ite ...................... 366— F ailu re of m achinę to operate properly

often due to m an ....................................... 544— H eating of conductors; In sta lling sh a ft

cables, 22 : Use fiber-duct ...................... 254— Hook stick m akes fusing s a fe ................... *623— How to ground elec. m ining m achinery . . 947 — Ignition of gas by m otors and Controls. . 424 — In su la tin g varn ishes, N atu rę of, 221.

254 : Tests ................................................... 330— Keep locom otive arm atu rę bearings cleań 581 — Keeping record of perform ance (e) . . . . 752— L arry -car service, M otors fo r ....................*237— M aking elec. equipm ent safe to use . . . .*921— M eter accuracy affected by Iow pow er

fac to r ................................................................. 854— M otor-generator se ts in substa tions con-

tro lled from “ su rface” ..............................*593— M otor-generator set not grounded . *149. *182— M otor-generator sets, undere-round . . . . *344— M ultiple-speed fan m otor, S low ing............ 755— P ro tec tin g m otor generators and ro tary

converters ....................................................... 544— P u t voltm eters to w ork ........................... . 759— R aił bonding to fu li capac ity . *331— R enair of m achines pays, *172: Rock

_ d r i !* ............. : --------- „....................................* 221 , *253— K equirem ents in safe operation ............ 948— R otary converters, S topping flash-overś

on ................................................................. 702— S afety-fuse box sueeessful ................. ! ! ! ’ *545— Sentionalizing taps, E asy m ethod of m ak-

mer ............................................................... *649— S p ark in r Causes of ................................ . 6 16— standardizing- m o to r speeds ................ 758— Storage batte ries , A u to m atic chargińg

of ............................................... ......................... 680

Page PageElec. M achinery, O perating. See also “Equip-

m ent, E lec.”— Continued — To keep equipm ent in good con d itio n . . *843— V oltage in common use ............................... 343— W atch fo r breakdow ns before they affect

purse .................................................................. 758E lectric P lan ts and Stations — A utom atic substa tion equipm ent, Opera

tion and control. L ich ten b erg ...............*912— Coal consumed and power g enera ted . . . , 541— Coal p ier electrically operated ................. *48— Elec. hoist, P acker No. 2 slope, Shenan-

doah. P a ............................................................ *35— F lashing of substation generator stopped

by choke .coil ...............................................*887— 'High-yoltage transform er substation . . . *632— Inside power sta tion .....................................*678— Isolated vs. central pow er p lan ts (e) . . . 196— 'Light and power p lan t, 110 v o lt ............ *302— Mine pow er p lan t, Cheap pow er b y ..........*210— M otor-generator sets in two substations

operated in parallel. W agner...............*593— Poles. Dimensions of W estern red cedar;

„ table ................................................................ 290— Pro tectiye ap p ara tu s fo r substation

equipm ent ......................................................*701— Smali light and pow er p lan t ....................*659— Substation a t load center u n d erg round . . *757 —-V en tila tio n of underground substations *2 1E quipm ent, A ir— A ir contro l fo r coal and rock dum ps. . . .*526 — A ir cooler suited fo r turbo-elec. genera

to rs ........................................................ 432— A ir drill fo r generał use, 3 -cyiinder * mo

to r .................................................................. *750— Air ham m er fo r riveting . . . . . . . . . *. *32— New model a ir hoist ........ . . . . . . . . *230— Air-sw ept mili fo r pulverizing coal. . . . . *32 — A ir-table cleaning, Theory and practice.

A rm s ..................................................................— Drill and ream er ............................................ *376— H igh-pressure a ir blow er ............ .. *518— Recording steam and air-flow m e te rs .. *968— U nit type a ir h ea te r .................................. * 5 13E quipm ent, E lectrical. See also* “Elec. Ma-

chm ery. O perating ,” “T ransfo rm ers,” W elding.”

— A utom atic m ine equipm ent, E lec. engrs.discuss ............................................................ 286

— A utom atic sw itchboard contro is powerdie tribu tion ................................................ * 2 1 1

— A uxiliary fan m o t o r ...................... ! ! ! ! ! ! ’. *345— A uxiliary relay fo r long tim e-lim it śerv-

!ce ......................................................... *340'— S leS; v̂ Jve erinder, L ig h t weigrht' ! ! > 1 6 0hj. M. B. resistance now o b ta in ab le ..........*266— L ow -rate b a tte ry charger ................. *302— Sw itchboard recording in strum en t, P o rt-

able . ................................................................ *19 4Trolley wire, Proposed spedfications fo r 366

— Resistance grids, Damage resu lts fromhas ty repairs to ..........................................*401

— Elec-power transm ission line. .................... 401— P um p m otor ...............................................*4J_2— F a ir . t r ia l fo r new equipm ent ( e j . . . . . ’ 4 14—JElec. capstan ca r p u lle r ........................... * . *448

Oil c ircu it breaker, New au to m atic . *448 — Poles, C ircum ference of ch es tn u t: tab le 473— Jijlec. pow er t r a m m e r s .....................................*482— § lec- drill and ham m ers . . ! *518

§ r ° undil?S clam p fo r conduit System s. . *518 — t r ansf er rack, Cheap and efficient.*544 —̂ Bell-nngm g batte ry floats on au tom atic

c h a r g e n .................................................................— Safety-fuse box s u e e e s s fu l .................... [ ’ *545

C urrent relay and self-contained am m eter .*553 — i? Iow m eter fo r gas or liquid, E lectrically

operated ..........................................................*5 5 4— Elec screw driyer and socket-w renćh! ! ! *554

Insu la tion resistance. In stru m en t fo rm easunng .................................................... *554

— Sw itchroom fo r contro l of cirćuiiś! . *57 1—<Cam-type controllers, Care and adjust-

m en fc ...................................................................*580inclosed grinder fo r m ine shops. .*589

M eters fo r sw itch board use . *604— R ubber jacketed. portab le cab le . . ' . ! ! ! ! 623

Expansion tan k fo r large capacity tra n s form ers ........................................................... ...

— J y p e drill, General u t i l i t y ............... ! . ! ! 624— B ette r equipm ent low ers cost . . 679— Pressure-contro l re lay .........................' ! ! ! *712

A utom atic lim it sw itch fo r e lectric h o is t *712 — M otor fo r driv ing fan a t variab le speed,

isest type: C hadbourne ........................... *722'Single and 3-phase m otors, Newlv de-

yeloped .......................................... .. *749? ^ 1y^ hase duet i on m otor, C ast ro to r of.*750

iliydonograph ’ records abnorm al yoltagesurges .................................................... *816

—-Relay indicates cu rren t flowing iń line! *864 — Copper-plated carbon b rushes n o t nec-

essary ........................................ 888T em perature relays h e a ts in sam e ra tio

as m otor ..................................... *898— M otor prenerator set, A utom atićally

operated .................................................... *9 14—IRotary convertor o u tfit ................. .. *914— Elec. m ine lam ps reduce fire h azard i ' ! ’ *92]— ^Phasmgr ou t a converter ..............................*922— I:’(' r(,er WJ ,T hang-er fo r m ine se rv ice . . . *922 — 5,wi‘ch synchronous m o to r. . . . *93J— Protected m otor hearinps, New types *946 — Keeps con tro lle r fing-ers and segm ents

from bu rm n g ............................................... *957— T ruck-m ounted electric w elding o u t f i t ! '* 9 6 8— Arc-weldiner o u tf it ................. «qfioEfluipm ent. Steam— Hiph-speed flexible coupling fo r tu rb in ę

drives ......................................................... 7*230— Steam tu ijine-g renera to r lip h tin g u n i t . . ' *376

ąieam -tu rb ine p lan t, Sw itchboard f o r . . . *631un it. M otor-driven ............... ."*864

d ’ ,m eter w ith new in teg ra tin g u n it 932 — R ecordine m eters, Im proved steam and

air-now ..................................... *968

January-JTune, 1924 C O A L A G E 5

P a ge PageEverybody’s business ........................................... 357Explosions, Mine— Kock d u st b arriers a preventive ........................ 48— F ro n tier mine, Wyo.; Barricade saves

lives .................................................................... *150— McClintock mine, Johnson City, 111.,

Jan . 25 ...................................................180, 219— L ancashire mine, No. 18, Shanktow n, Pa.,

Jan . 20 .......................................181, 248, *285— Study ot phenom enta in E u ro p ę ...................203— Rock dusting to prevent, 350; Need a t

C astlegate (e) ............................................. 450— Castlegate, U tah, Mine No. 2 . .395, *431, 503 — W ater as a preventive of mine explo-

sions (e) ................. ....................................... 414— Shanktow n, Pa., L ancashire No. 18 m ine.*419— Six explosions cause 129 d e a th s .............. 420— Im p o rtan t da ta .................................................. 424— Y ukon-Pocahontas Coal Co., No. 2 Mine,

Y ukon, W. V a...................................... 502, 539— Hydrogen content in coal dusi a cause. 573 — Y ukon explosions, Report of coroner’s

ju ry ................................................................... 578— 'Rock dusting to prevent explosions. . . . 608 — M jnim iaing and localizing explosions;

Holman .............................................................*627— Phelps-Dodge Corp., E fforts to prevent

explosions ........................................................ *627— Percentage due to explosives ..................... 632— Benwood mine explosion, W heeling Steel

Corp...................................................................... 645— Stone dusting as preventive .........................*663— Open lights cause explosions and fires. . 675 — Chd Ben Coal Corp., Mine No. 11,

C hristopher, 111................................................ 685—(Panel system localizes explosions.............. 687— Benwood mine, N inety-three bodies

recovered ......................................................... 697— Benwood explosion show s need of un i

form law s ......................................................*728— Benwood b last due to gas and dust

ignition by open lam p ............................. *730— iKeeping m ines free from explosions;

Cost, e tc ............................................................ 769— Peabody picture film shows mine ex-

plosion .............................................................. 844— 'Glen Alden mine explo., Two investiga-

tions of ............................................................ 885— Rock dust extinguished seven explosions.*907— Barrages vs. coating system ..................... 907— Increase in num ber of explosions (e) . . . 934 — Removed ven tilating tubes, Gartshore

m ine (G rt. B rita in) ; explosion followed. 944 Explosives See also “B lasting”— Dynam ite exerts equal force in all

directions ................................................................... 23— Liquid oxygen dangerous in m ines........................ 45— iStray cu rren ts detonating explosives,

P reven ting ........................................................ *239— Q uantity reduced 25 per cent by use of

perm issibles .................................................... 321— Perm issible explosives reduce c o s t.............. 382— Black powder vs. perm issib les..................... 382— Low-freezing. 40-per cent dynam ite . . . . 412 — W eight of single charge in Grt. B rita in . . 426 — Gases produced, Bureau of Mine study . . 536 — Percentage of accidents in use; in trans-

porta tion ; from suffocation by fum es. . 632 —‘Perm issibles lessen fa ta lities, diagram ;

Slow powder fo r b r ittle co a l................... 646— Pounds of perm issibles used per ton of

coal mined, d iag ram ...................................... 647— Perm issible explosives recom m ended. . . 807 — Abuse of explosives— W. Va. In st. paper. 814 — B ritish rules for locating m agazines. . . . 839 — Perm issibles vs. b lack powder, Dis-

cussion ............................................................... 943

Fans and Blowers See also “V entilation”— Elec. fans, Dangers in s ta r t in g ................. 16— E xplanation of fan in electrical te rm s. . *53— R esults of num erous fan te s tp .................... 53— H igh-pressure a ir blow er ............................. *318—<Auxiliary fan m o t o r ....................................... *345— Forced d ra ft. T heory and prac tice .......... 352— Concrete fan h o u s e ..........................................*562— Fan m otor low ers cost ................................*679— 'Blower m ounted on tru ck fo r stone

d usting ............................................................. *685— M otor fo r driv ing fan variab le speed,

Best type ........................................................ *722— C haracteristic curves typical mine fan s . *723 — Cost operating diff. drives per year;

table .................................................................. 725— Slowing m otor to save p ow er...................... 755— T esting the fan. Don’t om it ...................... 760— Fan-m otor s ta rte r , Quick repair t o ............ *817— F an w ith heating u n it ................................*863—'Fan not idle w hen. power is availab le . . .*921 F arm ers dem oralized by crop shortages ( e ) .9 3 3 F arring ton urges co-operation of minera and

operato ra ...................................................... 733F ata litie s . See also “A ccidents”— Coal-mine accidents in M arch; ta b le ............ 643— Perm issibles lessen fa ta litie s ; d iagram . . .*646— Open lights. Due to ....................................... 675— F ra n k lin County, 111.. Percen tages all

causes: tab le ................................................. 685Firebosses— Exam ined in presence of gas ...................... 24— M any firebosses fa il to detect 3% of gas. 24 F ires, Mine— Crop fires. w atch fo r (e) ........................... 2— B itner fire. Sum m it H ill and Red Ash

fires costly ( e ) ............................................... 2— V entila te fire a rea w ith inert g a s ............ 55— In e rt gases in figh ting m ine fires. Rela-

tive value o f ................................................. 243— P rotection by stow ing, by ven tila tion , or

by stoppings ................................................. 291— F ire pum p, approved single-stage ..........*340— Alden mine. Sealing off fira i n ................. *379— A nalyses of re tu rn a ir from fire; tab les. 382

Fires, Mine— Continued— F ire largely lsolated by fau lt, successfully

sealed ............................................................... *379— Oxidation ol pyrite o r of coal cause of

five ................................................................. 509— Per cent oxygen in re tu rn a i r ................. 640— Open lights cause of fires ........................... 675F irs i Am 2>~e aiso “Mine Rescue— Seventh in te rn a t’l c o n t e s t ......................52, 397— In ternational m eet postponed ................... 698Flam e caps used fo r testing fo r gas over

100 y rs .............................................................. 536F lushing old workings .................................... *356Fording th rough a mine en try in W yoming.*862Fordson trac to r eąuipped w ith shove l..........*590France— Rock-dust barriers com pulsory................. 48— Coke situa tion m ain fea tu rc of fuel

problem .......................................................... 105—.Operators aid m iners and repair p lan ts .* 2 5 6— Mechanizing coal m i n e s ................................ 349— Coal o u tp u t near pre-w ar lev e l................. 611F rank lin Coal Co. charged w ith u n fa ir

m ethods ................... . ..................... ; ................ 882Freezing process to sink sh a fts in N orth

Belgium; B iąuet ............................................*831F re igh t R ates See also “ R ailroads,” “In te r

sta te Comm. Com.”— H igher N . Y. ra tes ......................29, 122, 191— 'New coal ra tes in A lab am a ........................ 61— N orthw est rates, No ad justm ent o f . . . . 81— Coal fre igh t-ra te decisions ........................... *85— New England vs. coal ra tes; Buffalo to

M inneapolis ................................................... 157— Indiana mines get lower ra te s ................. 227— Illinois, Coal ra tes cu t in ........................... 263— E xport coal, Lower ra tes ........................... 263— New freight record, 1923, all roads. . . . 299—iConsolidation to assist ra te c u t ............... 577— Indiana rate-cu t postponem ent................. 589— New ra te w ar in N orthw est ...................... 623— iRates fo r all tidew ater coal no t subject

to Sec. 28 ................................................... 650— N orthw est hard-coal ra tes favor docks. 659 — V irginian to Deepwater, T hrough r a t e . . 711 — New freigh t ra tes benefit Southw est. . . . 780 — Buffalo-Twin Cities ra te boost effectiye

Ju ly 1 ............................................................. 863— T runk Line hearings on proposed ad-

vance in ra tes .............................................. 897— Five-cent cu t in coal ra tes on Chesapeake

& Ohio ........................................................... 897— Indiana ra te cu t deferred ........................... 931— N orthw est ra te changes delayed a m onth. 956 F uel— Economy in use of fuel, Engineers study. 136— Consumers’ economies, Hood .................... 145Furnace, Com bustion in— Effect of Iow arch *389; Raising fron t

arch *391; R ear arch *394; Effect of air pressure, *390; air je t and parti-tion, *391; Steam je t ................. *392, 393

— F usib ility of coal ash, index of clink-ering ............................................................... 401

— Stoker Controls fuel bed, hopper toashp it ............................................................... *750

— M uch h ea t wasted in furnace w alls. . . . 871

G•Gases— Orsat m achinę, Testing flue gases w ith . 22— N atu ra l gas, Consum ption and production 72— Inert gases in fighting m ine fires, Y alue

of ....................................................................... 243— Ignition of gas by sparks from falling

rocks ............................................................... 293— Gas indicator, to replace flame safety

lam p ............................................................... 403—‘Self-rescuer device providing escape from

Gas ........................................................ 420, 640— Firelam p explosion slower than coal dust. 423— Ignition of firedamp, M eans of ................. 424— M ethane and air, Explosive lim its and

o th e r data, W heeler.................................. 489— Hydrogen and air, Explosive lim its wider

than m eethane................................................ 490— E arly testing fo r gas in m ines.................... 636— Gases produced by explosion of pow der. 536— Production of n a tu ra l gas; d i a g r a m. . . . *563— Ignition by sp a rk s; discussion ................. 565— Hydrogen in coal ............................................ 573— Oxyen in re tu rn a ir from mine f i re. . . . 640 — Safety lam p w ill bu rn in fafcal a tm osphere 640— Open door, Gas accum ulates f ro m .......... 686— Safe gas lim its— W heeler vs. W alker (e ). 714 — Gas an active riv a l of an th rac ite ;

C arpenter ...................................................... 766— Transm ission of gas by pipę lines, (e)

795, (e) ........................................................ 933— -Should B uffalo’s gas be m ade a t the

coal m ines? ................................................... 951Gas M asks, Use of, in m i n e s ........................... 640Geology and P rospecting—-Cross-section M am m oth and Buck M t.

veins ................................................................ *36— W ants are due to erosion ........................... 151— A ppraising coal, Geology in ( e ) ............... 413— Roof fa lls more frequent a t n ig h t ............ 464— U nm arketab le coal in seam, D eterm ining.*465 — S outh Wales, Folded coal seam s like

P e n n ..................................................................... 466— Beckley coal bed, W. Va., L im itatiui.*

and eccentricities; S tah l ...........................*485— Surface breaks, E x te n t beyond excavated

area ...................................................................*543— Deep hole drilling by sectional rods . . . .*614— D ircction o f f ra c tu re re fau lts , (e) . . . . 866Geological Survey, U. S.— Y am pa coal field. Colo., R eport of

10. 48 .............................................................. 138— R eport on coal s t o c k s ................................................ 19— Topographic m aps reąu es te d ....................... 209— Coal resources in Clarion Co., P a ................. 573Georgia—-Coal, Class of . .................................................. 171

Germany— Seeks way ou t of R uhr p rob lem .............. *107— Coal reserves lost as resu lt of w ar; tab le .*107 — Im ports of coal; table, 108; N ations’

exports, table .............................................. 109— Uunsual hoisting headfram e ................. ^*130— Coal reserves ................................................... 17— Im ports affected by political s itu a tio n . . 225— R u h r coal ou tpu t. L ockout c u ts ............ 738— Stinnes funeral .............................................. 578— R uhr coal m iners reject m ed ia tion ........... 814— R uhr coal strik e settled ............................. 849— Strike in German mines unprofitable to

w orkers .......................................................... 953— Production, Im ports, exports, consum p

tion of coal .............................................. . 953Get com petent engineer etc.; K n ig h t............ 615•Glen Alden Coal Co.— F our m ines flooded ....................................... 576— U nw atering the m ines by p u m p s............ *635— Explosion k ills 14 m en; Two investi-

gations .......................................................... 885— Strike collapses .............................................. 696Governm ent eon tro i of coal industry, 736, 737Governm ent to own n a tu ra l resources, Ber

ger w ants 848G raft in business ................................................ 497Greased m outh cannot say “No” ................. 497Grease-gun lubrication of c a r s ......................*854Great Britain— Machinę mining, Coal cutters, tonnage. 14— Coal Exchanges assist sales ...................... 15— N ational wage agreement, 43, 56; Rice. 145 — E arnings of m iners in various districts,

Table ............................................................... 44— P riv a te cars employed in So. W ales. . . . 47Rock-dust barriers com pulsory...................... 48— B ritish trade unsettled ............................... *104— L abor program , ( e ) ....................................... 162— Production per m an -sh ift; ta b le ............... 252— R apid strides in coal tra d e ...............: • • • ^82—-Shaking chu tes to convey coal u p h il l . . 354— Animal hau lage vs. locom otives................. 382— Stone dusting vs. spraying p rac tice .......... 425— W eight of single charge in b la s tin g . . . . 426— Coal-mine accidents ....................................... 427— Miners reject 1 0 ; ask 20 per cent in-

crease ............................................................. 433— Safety expert studies coal industry here. 434 — A ppointed Lord High Com’r, Jam es

Brown, ..................................................... 435, *542— W asher trea ts mixed coals of widely

yary ing character .......................................*455— Mine law s described; How diff er from

U. S. law s ...................................................... 462— Mine practice com pared w ith A m erican. 462 — S o u th W ales coal seams folded like Penn. 466— Gaseous m ine defined in law .................... 490— M iners reject operato rs’ offer ................. 577— Ball-bearing m ine cars. E ngland investi-

gates .............................................. • .......... 605— 'British E m pire exhibition, Coal m ine at.*735 — House of Commons refuses to nationalize

m ines ............................................................... 779— How m ines diff e r from ours ...................... 769— L aw s in B rita in regu late handling lam p. 806 — W embley exposition, Coal-minf- model at.*815 — B ritish ru les fo r locating m agazines. . . . 839 — W elsh an th rac ite seeks Canada m ark e t. 882 — b r itis h also tak ing stock of resources. . 942— G artshore m ine explosion ........................... 944Grease-gun, A lemite h igh p ressu re ...............*711G rinding and polishing wheels, How select

and use ............................................................... *22?Grow th of W. Va. coal fields ...................... 609•Guaranteed con trac t urged to restore con-

fidence; W ooton .............................................. 601Gunite— Test in explosion a t Bruceton m in e .......... 56

HH aulage. Mine. See also “Locom otive, M ine” 490 — Smali cars lim it tonnage in B ritish mines,

(e) .................................................................. 34— Trolley wires excluded from B ritish

m iitós ............................................................. 42— D rop-bottom cars. Capacity and construc-

tion of ........................................................... 56— Trolley clam p, Bulldog ................................*160— Section insu lato r sw itch *230; Locking

type ..................................................................— E levated track aids repair of mine ca rs . *254 — Combined conveyors and cars, vs. all-

conveyor system .......................................... 322— R aił bonding to fu li capacity ........................ *331— Mule collar, H ealing ..........• . • • • • . .............. *340— Trolley wire, Proposed specifications . . 366 — W reeks in m ines d im inish proflts (e) . . . .520— T rack tie in one piece .................................. *590— P oor bonding of ra ils causes w aste of

pow er (e) ............................................ .. • • • 591Trolley w ires excluded from B ritish m ines. 42T ro lley clam p, Bulldog ..................................... *160R aił bonding to fu li capacity .......................... *331

pow er (e) .........................#............................... 691R aił bonding to fu li c ap ac ity ......................... 331M ule collar, H ealing .......................................... 340— Self-rescuer device providing escape from — Firedam p explosion slow er th an coal dust. 423— Locom otive required, W eight of .............. 638— Ashley p lanes li f t coal a t Iow cost . . . .* 6 4 9— P o rta b le conveyor co-ordinates m ining

and h au lage .................................................... *669M atch trolley-w heel grooves to overhead

fittings ............................................................... ™JL— M onitors, gunboats ......................................... 710— R erailer th a t holds itse lf firm ly in posi-

tion .......................................................................*897— Self-acting m ine door on hau lage ro a d . .*898— E ąuipm ent a t Ind ian m ines— modern.

*943; prim itive .......................................... ..— Cost reduced by m inor changes in^

locom otive ....................................................... 967

o C O A L A G E Vol. 25

H e re ’s a w et m ine ............................................... 815Hero m edals to fo u r m iners ........................... 396H igh finance in coal ....................................... 3t>3H illm an C. & C. Co. electrify ing its m ines. . 640 H illm an Coal Co.’s offer in study of me-

chan ical loading ............................................... 644H in ts on coal analyses fo r d in k e rin g

tem p era tu res ...................................................... 401— Dynam ie b rak ing in speed eo n tro l............ *3o— U nusual hoisting headfram e a t Germ an

m ine .................................................................. *130— Room -hoist m otors, Enclosed type, *300, 310 — Caging m ine cars on sh a ft b o tto m . . . . *367 — Resistance of a ir to cage, Reducing. . . . 509— Four-speed hoist ................................................ *660— H oisting p it ponieś .......................................... *700— A utom atic lim it sw itch for electric ho ist *7155— H oist ind icator ................................................. *774— Steel headfram e, High ....................................*873— Tw in-rope skip hoist w orks w ell................*935— H oover’s “ Buy-now” seheme causes u n

u su a l s itu a tio n ............................................ 812— H oover u rges ra ił m ergers to lower ra te s . 813 — H ow at a t w ork w hile aw aiting re insta te-

m ent ................................................................... 782— How m iner and m anager each ham pers

coal production ..........................................*383H um idify ing Mine Air— Colorado m ines, Real problem i n ................*386— T em peratures ałid hum id ity of re tu rn a ir;

tab les ............................................................... 386H ydraulic sto rage a t hom e and ab road . . . 355 Hydrogen as causes of explosion in coal

d u st .................................................................. 573

IIllinois— T rade suffers from h igh union w ages. . *17 — H errin , Conditions in, 19,248; Court

House ................................................................. *495— Snowbird operations develop .................... 19— M erger o f coal com panies ........................... 20— Receivers appointed fo r Southern Gem

Corp...................................................................... 50— Prices, So. 111.t Chicago m arket, table,

88; St. L ou is m a r k e t ................................ 101Percen tage of fu ll-tim e o p era tion ; Causes

of lost t i m e .................................................... *99— Southern Gem Coal Co., R eceivership

lifted .................................................................. 115— Illinois-W isconsin re ta ile rs deny boycott

charges ........................................................... 146— Ccal, Class of .................................................... 171— Mine explosion, Investiga ting f a t a l .......... 180— P roduc tion d a ta ; W orking conditions,

m an-hrs., tonnage; tab les ...................... 208— Illino is opera to rs agains t m iners’ 4-yr.

p lan .................................................................. 215— R iver sh ipm ent in m idw est reduces cost

of coal ................................................................ 246— Zeigler m ines m ake new r e c o r d ................... 249— L ast of th e “Coal M ohicans” ................... 287— C onstabulary law neededj in Illinois (e) . 303 — Begins 3-yr. acid te s t; M any m ines shu t

down ................................................................ 361— Screen problem in relation to m iners’ pay 394— Coal m ines change h a n d s .............................. 470— H alf of opposition vote on 3-yr. con tract

in 111..................................................................... 601— 111. Coal Corp. build ing huge m in e .............*535— N atl. Coal Assc., Two operato rs back i n . . 611— Mines generate own electric ity .................... *631— S tripp ing m ines and tonnage ........................ 734— F arrin g to n dom inates m iners, convention. 778— Am endm ent of State law dem aded .............. 778— One m ore Illino is m erger ............................. 779— M iners vo te against ou t-o f-w ork beefits, 814 — Union cu rta ils F a rrin g to n ’s p o w er........... 85ZInd iana— Prices, 4 th & 5 th veins, Chicago m arket,

tab le .............................................................................. 89— Percentage of fu ll-tim e operation; Causes

of tim e lost ..................................................... *99— Coal-loading m achines w ork success-

fu lly ........................................................................*163— Coal. Class of ..................................................... 171— Production d a ta ; W orking conditions,

M an-hrs., tonnage; ta b le s ......................... 208'— F o u r-track steel tipple, C linton Coal Co. .*2 3 3— Coal ac tiv ities inerease ................................. 288— M erger m oyem ent, Com panies jo in ........... 607— B razil-b lock opera to rs to sign new con

tra c t .................................................................— R ates on b itum inous coal reasonable . . . 659— Ali Ind iana ta lk s m erger ............................ 886— Ind iana ra tę cu t deferred ............................ 931Ind ia— Mine equipm ent and m ethods, *943,

*944, *954In d u str ia l co-operation lunch ........................ 764Ingle describes m ine w here coal is loaded

by m achinę ...................................................... 811In jec to r, S tone-dust ...............................................*667In stru m en ts th a t decide your fo r tu n ę ............. 760In terconnection of power, R apid grow th of;

W ooton ................................................................. 435In te rs ta te com m erce Com. See also “ R ailroads’ — A ssigned-car suspended order extended. . 29— A n th racite ra te heari. gs ...................................... 29— R eading flnancing approved ............... 29;— Va. Coal O perators Assc. vs. ra ilro ad s . . 29— Suspend h igher hard-coal ra te s ............................. 61— Coal hearings assigned: R ates. 111. So.

D ak., unreasonab le ...................................... 122

PageIn te rs ta te Commerce Com. See also “R ailroad”

— co n u n u ea — No u u ju s t aiscrim ination against Wind-

m g Guif uoiiy. c o ..................................... 122— U tan vs. Wyoming, D ifiereiitial ciaim ed

u n fa ir .............................................................. 1 5 7— Penn.-W . Va. ra ie s to N. E. & iW iiiu rn

N. Y., ln ąu iry deierred ........................ 191— N orthw est w an is >aie uecision ................. 191— Recess in P ittsburgh-O hio ra ie ca s e . . . . 362— A ssigned-car order postponecl ................. 409— C ar-oistribution order, A ppeai auvanced, *45 — H ean n g 011 new m m e-raung sehem e. . . . o03— M ine-rating hearing postponed ................. 589— To reopen N . E . ra te- d iyision ease. . . . 623T — Oppose b iulding ot oO-mi. coai ln ic . . . . 623— M ine-rating case nearing ........................... 623— N ew -rate w ar in JNonhwest ...................... 623— H earings on coal tra n sp o r ta tio n ; Wooton. 641— P ostpone operation of Sec. 2 8 .................... 615—-Lackaw anna Steel Co. vs. Pennsy., Com-

p la in t dism issed .......................................... 659— In d ian a ra te s iound reasonable ............. 659— M idland Coal Co. vs. M idland K .K .. . . 659— R ate ru lings ...................................................... 711— A ssigned-car order set back ...................... 7Jt9— A ppeals se t ahead ....................................... 749— S outhw est ra te s reduced ........................... 749— Proyides lo r tak in g eon tro l of road from

coal com pany ............................................... 793— N orthw est Dock o pera to rs w in L ake dock

cases ................................................................ 850— P ro te s ts against N orthw est ra il-ra tes

decisions ........................................................ 886T— D istribution of cars, Order approved. . . . 918— A pproves Clinchfield lease ...................... 931— Denies low er r a te on Gauley branch,

C. & 0 ............................................................... 967— H earing on la te s transferred from Des

Moines to St. L ou is .................................. 967— D akota lignite ra te s hang f i r e ................. 967— G reenbrier & E astern m ines w ant New

River r a t e s ..........................................*.............967Investiga tion determ ines beat fu rn ace fo r

an th rac ite , M um ford ..................................... *389Iow a— Coal, Class of .................................................... 171

Jigs and Jigging See also “P re p a ra tio n .”— R ansom jig , *673; W ilm ot valve-piunger

jig ; B asket o r p an jig, *674; P lungerjig ; Jam es j i g ...............................................*675

“R heolayeur,” or R heo-w asher ......................675

K ansas— Investig a tes coal prices ................................ 114— Cutting m achines debarred ( e ) ................. 161— Coal, Class of .................................................... 171— In d u stria l Relations Court, U nfair test, 362 — General Shutdow n of mines expected. . . . 263 — In d u stria l cou rt decision upheld by Su-

prem e Court .................................................... 395— Chief mine inspectorship row .................... 470— D istrict convention supports H ow art (e) . 484 — S tate coal mne inspector, Leon Besson

appointed ............................................................. 505'— H ow at fo r sheriff ............................................ 537— Chief mine inspector, Leon Besson

appointed ......................................................*608Kelvin m edal fo r Thomson .............................. 641K entucky— T rucks slide in to river on ice coated pier, 50 — Percentage of fu ll-tim e operation; Causes

of tim e lost ........................... *89, *105, *109— Prices, C incinnati & Chicago m arkets;

tab le , 97 ; W estern Ky. D istr., Louis- - y ille & Chicago m arkets; table . . . . 100

— Union greeted w ith d y n am ite ...................... 115— S trip p in g operations inerease .....................*127— Coal, Class of (E astern K y .), 171; (W est

ern Ky.) ........................................................... 171— P roduc ton d a ta ; W orking conditions,

m an-hrs., tonnage; tab les ........................ 205— C onsolidation in W estern K y...........................32T— Suprem e Court orders Sandefur-Canoe

Creek case advanced .................................. 327— W age cu tting in S. E. Ky. and Eastern

T enn ...........................................................................329— W estern field upse t by consolidations;

N orth A m erican Co. seeks eontrol ofproperties ......................................................... 397

— R eport of silver in W est Ky. co a l.............. 399— E ast Ky. fields vexed by wage reductions;

Deadlock in wage parley in W est Ky.field, 43 3 ; (e) 4 8 4 ...................................... 504

— P ineville m ine resum es under m ilita rypro tection ......................................................... 539

— Shoot non-union men in K y .......................... 539— M iners refuse wage cu t ................................. 575— Conference to end m ine w a r ........................ 576— Tonnage ta x bill d e f e a te d ............................... 592— S trag ih t Creek, Ali qu ie t on ................... 509— S tra ig h t Creek troub le ................................. 642— Coal taxed a p len ty ...................................... 643— S trike in W est Ky. q u ie t ................................. 644— N orth A m erican Co. buys St. Bernard

properties ................................................ * . . 645— M erger W est Ky. Coal C o............................ 645— H art Coal Corp., P lo t to dynam ite p lan t

of ..................................................................... 778— H azard m ergers, M uch ta lk o f ................... 8 lo

PageKeystone employees accept w age-cu t............ 642K lydonograph records abnorm al voltage

surges ....................................................... JU . . . *816K u K lux and tlie law . . . .................... .. *496

L abel: L augh here ............................................. 436L abor— Convict labor m utiny in A la. m i n e . . . . 115 — A m erican lab o r 95 per cent, Pacific Coast

Coal Co............................................................... 1 1 5— Rid m ines of conyict labor ( e ) ................. 125— Im m ig ran t labor decrease, P assing of

hand shovel (e) ................................... . . 126— M onopoly of m ine labor, George Otis

Sm ith ............................................................... 14 5— Skilled vs. unskilled labor, C harles P .

Neill ................................................................. 14 5— L abor-saving m ach’y vs. union (e) . .161 , 177 — L abor program in G reat B n ta in (e) . . . . 162 — Sum m ary of data, b itum inous mines,

tab le ................................................................ 204— S hutting down m ines benefits industry (e) .556— Rep. p la tfo rm labor p lank ...................... 916L am ps, M ine See also Safety Lam ps— Carbide lam p. To clean ..............................*272— N ystagm us possibly caused by g lare of

lampsi .............................................................. 324— Open-llam e lam ps, B anish ...................... 660— Open lig h ts cause d isasters ...................... 67o— Open-flame lam p in m ine dangerous. . . 680 — Open lig h ts vs. electric cap lam ps in

b itum inous m ines ....................................... 807— Elec. m ine lam ps reduce fire h aza rd . . . . *921 L egality of trad e sta tis tics a v ita l issue,

W ooton ................................................................ 399Legislation—-Bitum inous law, Revision of ...................... 24— Fireboss exam . in gas dropped from law . 24— U niform law s of G reat B r ita in ................. 42— R ock-dust b arrie rs com pulsory in Great

B rita in and F rance ................................... 48— A dm inistration b ills to be drafted ,

52, 116, 251— B etter law s needed fo r sa fe ty in m in e s . . 66— Suggestions, Boil them down ( e ) ............... 126— Pro tective laws, Inspeetors u rg e ................. 146— Coal-m ediation P lan . L ew is ......................... 147— Em ergency bill, au thoriz ing Federal m ine

operation ......................................................... 147— P incho t an th rac ite bill to regulate in

d u stry ............................................. 147, 181, 250— C onstructive legislation (e) ......................... 161— S tate vs. self and com pany insurance (e ) .1 9 6— Stream -pollu tion bills ................................... 217— Im m igration b ill re in tro d u ced ...................... 434— Brydon urges legislation re str ic tin g labor

monopoly .......................................................... 436— Mine laws, G reat B ritain, vs. U. S..........407— Bill lim its T rade Comm. to probes au-

thorized by law .......................................... 602— Oddie prepores coal m e a s u r e ...................... 637— Im m igration bill ............................................... 576— M erchant M arinę Act, To defer effec-

tive date, 578; O peration of act (e) 692— New im m igration law , How effects old

quo tas ................................................................ 610— Illinois law, A m endm ents dem anded. . . . 778 — B ritish law s regu la te hand ling lam p . . . 806 — H ouse sa fe ty hearings to form model

m ining law ....................................................... 851— A dapting law s to m ining conditions (e) 899 L ethbridge coal field deyeloping rap id ly ;

T u rn er ......................................................................*459L ib ra ry fo r sale ...................................................... 527L ig h t a t the w orking f a c e .................................. 613L ighting the m ine (e) ......................................... 341L incoln car-greasing m achinę ........................... *77 'ZL in ing a sh a ft w ith precast co n cre te . . . . *437 “L ittle -G ian t” d rill m ounted on po rtab le

post ..........................................................................*773L oaders and Shovelers See also “ Steam

Shovels”— C raw ler-Tread loader ....................................... *64— Coal loaders, N um erous types ................... *67— M achinę vs. hand loading; Inerease to n

nage ............................................ *131. *197 283— M echanical loading; P ow er shovels, sav-

ing in ...................................................................*277— W ilson chain loader ....................................... *305— (Factory to m an u fac tu re coal loaders

exclusively ............................................... .. • 327— M yers-W haley shoveling and loading

m achinę ............................................................. 396— Give your shovels fa ir tr ia l (e) .............. 414— Shovel driven by F o rd en g in e ....................... *590— Effect in p roducing large coal ( e ) .............. 662— Give loading m achinę chance i t deserves;

G ottschalk ..........................................................*681— Big o u tp u t from loading m achines, How

to get; Dake .................................................... *689— Advice to use rs o f m echanical loaders. . *699 — W hat m echanical loaders can do; How

perfected ............................................................*767— R ecord of advance in m echanical loading. 767— L arg e shoveler a t w ork ................................... *768— W here loading m achines m ay defeat

th e ir purpose ................................................ 768— L arge c a r fo r m achinę lo ad in g ....................*775— Perm issib le equipm ent fo r underground

loaders, M eans .............................................*783— Keep m achines sa fe from fire and

explosion ......................................................... , 783— Old vs. new w ay of load ing c o a l .................*783— L oading s tr ip -p it coal .....................................*800— F ittin g loading m achinę to physical

conditions .........................................................*809— Breakage n o t due to l o a d in g ....................... 811

January-June, 1924 C O A L A G E 7

PageL oaders and Shovelers. See also “Steam

Shovels’ ’— Continued *—M achines th a t will drive 100 ft. daily . . 811 — Loading by m achinę in Ind iana m in e . . . 811 — M echanical loading problem s re room-

and-piliar and longw all w orkings. • • . *84o — M aking cars large and Iow lo r m achinę

loading .......................................................... 846— Indian type of loading m ach inery ............*943Locom otives, Mine— Trolley wheel, A ttachm ent to lubrica te . *148 — P ara lle l ODeration of m otors on mine

locomotive6 ................................................... 149— Trolley locom otive w ith cable reel, *172. *309— Locom otive m otor, *173; con tro lle r..........*174— O perate locomotive m otors w ithin rating . 308 — Enclosed type of m otor, *309; Best fo r

hoists ............................................................... 310— Trolley locomotive, Newly designed. . . . *376 — Storage-battery locom otives vs. horses. . 382 — Resistance bank w ith ex tra te rm ina le . .*401 — Checking locom otive wheels before using;

K enw orthy ................................................... 472— Trolley bushings need lubrication .......... 473—*Keep arm atu rę bearings c lean ....................... 581— Bali bearings on drive s h a f t ........................ *005— Size and num ber in p anelw ork ................... *637— Means taken to keep locom otives f i t . . . * 6 4 8— Backpoling dangerous .................................. 649— O harging storage ba tteries a t n ight,

A utom atic ..................................................... 680— Storage-battery locom otive a success (e) . 752 — Storage-battery haulage locom otive. . . . *755— Storage-battery Iow locom otive................... *777— L ubrica tion of locom otive m otor bear

ings .............................................................. . 784— rWaste sa tu ra tin g tan k fo r lubricating

bearings ........................................................*816— P ack locom otive arm atu rę bearings

regu larly ........................................................ 817— H eadlight b u ilt to counteract bum ps in

ro ad ................................................................. *827— Oil grooves fo r m otor bearings ............... 854— F irs t locomotive a t Indian coal m in e . . . *943— Operating practice ......................................... 948— M inor changes in locomotive reduce

hau lage cost ....................................... *967L ow ering coal down hillside m inim um

breakage; 0 ’Neale .................................... *715L u brica ting system fo r rod bearin g s..........*711

MM achinę M ining— Forging and tem pering b its ........................ *3—^Great B ritain , Coal cu tte rs in use,

tonnage .......................................................... 14— Union vs. labor-saving m achinery, ( e ) . . 101— E xperim ental stage now p a s t ................... 166— Men employed in m achinę m in e ................. 164— New coal cu tte r drives gangw ays............*240— Strip mine reduces cost, M achinę cutting.*415 — Steeply p itch ing coal beds undercu t by

m achinę .......................................................... *451— Gaining in W. Va .......................................... 538— Straight-face m achinę, Turning a ro o m ..* 5 9 9— Tim bering stra igh t-face c u t ......................*602— -Panel entries, L ength of ............................. 637M achinę R epairs— Pipę gaskets, H ints on ................................ 183— Gear tee th , Replacing b ro k e n ......................*290— Grindstone fo r sharpening tools ...............*290— N icking of copper, A void ............................ 290— C utting and tapping m achinę th read s. . . *279— Don’t lengthen your wrench ....................... 958M aking sm oke problem s our p ro b lem .............. 422M anagem ent, Mine— Chance in m anagem ent; Losses a t tipple;

Underground supervision; Correlationo f m ining operations ................................*137

— Car-standing capacity chart, aid tom anagem ent ................................................... *183

— Three years fo r m odernizing th e mines(e) ..................................... , ............................ 303

— Company doctor, Co-operating w i t h . . . . 387 —tDouble-shift w ork; supply of cars, e tc .. *385 — H um ań ąualities in mine m anagem ent (e ) . 413— Blindness in m anagem ent ( e ) ..................... 483— Subordinates in m anagem ent ( e ) .............. 484— Determ ining true value of new equip-

m ent (e) .......................................................... 519— Conference a t Cleveland (e) ........................ 555— Company com m issary ...................................... 573— Goodwill in m anagem ent ( e ) ..................... 829— M anagem ent to fu rn ish d a ta fo r new

tipple; Brosky .............................................. 834— Consolidation to avoid b an k ru p tcy ( e) . 866 — A deąuate housing of employees ( e ) . . . . 899 M aps and Surveys. See also “Surveying”— -Mine conditions indicated on m ap by

tacks; W hite ................................................ 403— L ethbridge (Canada) coal field. M ap of.*460 — Beckley (W. V a.) coal field, Map *486;

Cross-section ....................................................*487M aryland— Coal, C liss of ................................................... 171— P roduction data , w orking conditions,

m an-hrs. tonnage; tab les ........................ 206— Georges Creek m iners accept wage c u t. 470 M assachusetts— Coal Inyestiga ting Com. o f eta te legis-

la tu re , F indings ...................................................... 50— B ureau of Mines test quality of an th ra-

a ite de liv e rie s Ce) ................... .............................2 6 7M echanics— H eat-unit equivalents; H eat u n it per sq.

ft. per m in. equivalents ............................. 149— E quivalen ts of 1 ft.-lb ., 253; 1 kg.-m . . 290—‘E quiva len ts of 1 h p ......................n. ................ 402— Shop practices, C utting and tapp ing screw

threads .............................................................. *279M eehanization— M echanical im provem ents, Many, 77, ( e) . 125— Complete m eehanization (e) ..................... 196— H andling m ining m aheinery. F ac ts re-

garding .............................................................. *307— Effect on m ining engineers .......................... 324

PageM eehanization— Continued— M echanizing French m i n e s .......................... 349—-B etter ra th e r than m ore mines ( e ) . . . . 555 — M echanical loading. B ureau of Mines to

study ............................................................... 644—iUnion vs. non-um on mines ( e ) ................. 7 13M etal-spray gun to prevent corrosion ..........*793M ethanom eter for testing for gas ............ 403Midwest dealers fight snow birding . .......... 956Mine Inspection— H ardships and aw ards of inspection

service (e) ................................................... 232— Mine In sp ’s In st. of America prepare

fo r big meeting, 608; A nnual m eeting. 807 Mine Rescue. See also “F irs t Aid”— Com m unication systems. F u tu rę ; Radio

experim ent8 ................................................. 13 9— Stretcher, Use of board a n d ................. .. 184— Rescue squad en te ring Castlegate m ine .*432— Rescue team a t C astlegate ........................ *575— A pparatus, Use of rescue............................ 04U— E quipm ent m ine-rescue s ta tio n .................*08UMiners— Miners draw lo ts fo r w orking places. . 23— Am ericans 95 per cent, Pacific Coast

Coal Co............................................................. x i 5— E yestrain and n y sta g m u s......................255, 324— M iners’ cram ps, Prevention o f ................. 300— A sthm a decreasing; T ubercu lar risk from

breath ing dust .................................... 350, 417— Coal house, Convenient ................................*354— Insurance on lost m iner p a id ................... 301— M iners to vote on new agreem ent.......... 363— M iners re tu rn hom e; d iag ram s.................*384— Record of three loaders, d iag ram ................ *38o— Canadian m iners w ant more p a y ............. 397— Bronchitis, pneum onia am ong m iners. . . 418 — Central Penn., Convention o f D istrict

No. 2 ............................................................... 407— Long record, 10 ,000 days underground. . 505— Jobs fo r jobless m in e rs ................................ 639— W orking places, M iners should d ra w . . . 650 — Southw est m iners renew scalę fo r 3 yr. 69b— C entral Penn. accepts wage c u ts ............ 690— Idle m iners absorbed by o th er industries. 098— Cham pionship fo r loading c o a l................. ,00— P lo tte rs confess to dynam ite p lo t ............ 778— Keep wolf from d o o r ..................................... 779— Will m iners p lay polo and m ah jong

next? ............................................................... 78 I— Will idle m iners get aid? ........................... 814— Illinois m iners vote against out-of-w ork

benefits .......................................................... 814— R uhr m iners reject m ed ia tion ...................... 814— Hocking m iners w ant scalę th a t will get

work .................................................................. 952— St. Bernard (Ky.) m iners tak e 20 per

cent wage cut ......................................... 954— M iners and guards b a ttle a t Brady Mine. 956MINES— P acker No. 2 slope, L . V. C. Co., Shenan-

doah. P a ............................................................ *35— “Captive m ines” on the inerease............ *73— “Captive” vs. com m ercial m ines; Table,

days w orked ................................................. 76— S tripping operations grow in K y................ *127— Queer nam es of m ines .................................. 151— Oldest coal m ine in America, S upposed. . 185 — P a rro tt coal mine, New Riverfield, V a ..* 2 7 1 — Old coal m ine yields curious re lic s . . . . *273 — Soft-coal mines, pow der m agazines, (e) 304 — Lewis mine, W. Va., Błock system, elec.

haulage, *343, T ank tru c k fo r weldingou tfit ............................................................... *365

— Shutdow n in Illinois, Many .................... 301— Shutdown coming in Southw est. . . . 3 0 3 , 504 — Consolidations upset west Ky. field. . . . 3 9 / — Strip mine biggest producer in South

west ..................................................................*415— Leavell mine, Okla., C utting m achines

in ...................................................................... *416— Stag Canyon mine. Calif., R o tary dum ps.*426— Smali mines, A dvantages of, ( e ) ............ 450— Iso lated coal-m ining d istricts, ( e ) ............ 450— B utterley Co.’s Ormonde Colliery, Derby,

E ngland .......................................................... *455— Beech Bottom mine, B etter m ethods in

erease production; B ro sk y ......................*521— Pineyille (Ky.) m ine resum es ................. 63ii— Nason mine, Illinois Coal C orp. *535, (e) 555 — 0 ’G ara Coal Co.’s m ine No. 12, H arris-

burg , 111............................................................ *557— Glen Alden m ines flooded............................. 57b— Excess mines, R easons fo r closing. . (e) 020 — N ational mine, Glen Alden Coal Co.,

flooded ................................................. *635, 0*0— “ Balanced m ines” and rock-bottom co s ts.* 6 3 7 — E lectrify ing m ines of H illm an C. & C.

Co......................................................................... 640— P eculiar nam es of mines ........................... 650— W hat causes b an k rup tcy ( e ) ...................... 601— M ake th e m ine pay ( e ) ............................. 601— Old Ben Coal Corp., Shale dusting in

m ines of ........................................................ *683— V alier Coal Co. pulverizes shale from

own m ines ................................................... *684— Glen Alden, S trike co llapses........................ 696— C onsolidation Coal Co’s m ines closed. . . 733— Shipping m ines in I llin o is ........................... 734— R eliance-H atfield Coal Co.’s m erger. . . 734— Crane Creek M ines, W. V a ........................*763— B ritish m ines d rie r ....................................... 709— R ating of m ines to receive c a r s ................. 770— Old Ben Corp. mines. Ul.. Rock d u stin g . *907 — Phelps-Dodge m ines, rł. Mex., Rock d u st

ing .....................................................................*908— W orld’s h ighest m ine ................ ................. 920— Sheridan-W yom ing Coal Co.’s tipp le . . . . *92y — T herm al (U l.) No. 4 mine, Tw in-rope

skip h o ist ..................................... ................ *935— Ind ian coal m ines, F ac ts concern ing . . . . *94o — No. 9 colliery, P enn . Coal Co., P itts to n ,

P a ...........................................................................Mine w ater, C orrosive effect o f ...................... 365

PageM ining Conditions— Roof falls more frequen t a t n ig h t ............. 464— L ight a t the working fa c e ......................... 013— Panelw ork, F acto rs in .......................*037— How roof breaks ahead of face in Jong-

wall .........................................................*846—^Scarcity of tim ber m akes changes <e) . . 900Mining, Methods of. See also “ S tripping”— Conyeyor system ..............................................*131“V” system of m in ing ...........................*197, 950— Advancing face in steps giviag saw -tooth

front, ( “V ” system ), 322- A dvantages over room -and-pillar w ork: Do overlongwall ........................................................... 203

— Drawing pillars; robbing ............................. *292— Błock system in Lewis mine (W. V a.) . 345— Flush ing (hydraulic etowage) ....................*355— Longwall cheaper th an stow age.................. 350— Panel system on steep p itc h e s...................*4552— Panel mining, Considerations in ...............*637— Longwall system in Sydney mines, N. S. 948 Mining Towns and Housing — Company problem s in isolated cam ps. . . 10— Bath-house a t a D utch m in e ........................ *161— <Good-living conditions. Influence of ex-

am ple on ....................................................... 209— Company laundries for m ining t owns . . *244 — Company doctors in m ining town

practice ........................................................... 245— Coal house, Convenient ..................................*354— W ash fountain , Sanitary ........................ *412— W ash house, Building .................................. *53o— Few changes in house p lans afford com-

fo rt; A rnold ...................................................*572— B ath and change house, Ca3tiegate. . . . *575 M inim izing and loc iliz ing coal-mine explo-

sions ....................................................................... *027M issouri— Flooding of ore mine, F a ta l ................................. 20— Study of fuel oil in com petition w ith

coal ............................................................................. 113— Coal, Class of ................................................. 171— Retail Coal M erchants’ Assoc. charged

w ith u n fa ir m ethods ................................ 288— General shutdow n of m ines expected. . 303 — Consolidation in the wind a t St. L ou is . . 430 — Federal Trade Comm. vs. F ra n k lin Coal

Co ....................................................................... 882M itchell m em oriał unyeiled a t S cranton. . *852 M odernize !— Some revo lu tionary suerfireai-

tions w ith practical possibilities in ac tualpractice; Dake .................................................. *131

M otor bearing, P ro te c ted ....................................*945Myers-W haley shoveling and loading m a

chinę ................................................................................ 390

N ationalization of coal mines, ( e ) ............ 753N avy and m arinę corps aw ard coal con-

tra c ts .................................................................... 850New Mexico— R aton coal field, Mines i n ........................... 630New Y ork— Coal s itua tion , S tate h a s no contro l of. 51 — Bids subm itted to supply City depart-

m ents ............................................................... 578— A nthrucite circular prices; ta b le ............... 090— W hitehall building coal c en te r ................. *098N orth A m erican Co. (N. Y .) bu y s property

in K y....................................................................... 64 dN orth A m erican Fuel Co. to ru n open-shop

basis .................................................................... 881N orth D akota— L ignite fields, options taken by 'German

firm .................................................................. 50— Lignite ra te hearing resum ed ...................... 711Novel m ethod used to anchor pow er to wers. 401

OO bituary

— Allen, W. L ., P re st. Scranton Coal Co. . . . 288— B am h ard t. W. G................................................— Bates, L . W ...........................................................*644— B rinker, W. M ................................................... lo 7— Brooks, E . S., V ice-Prest. & Gen’l Mgr.

U. P . Coal Co................................................ 471— Brooks, J . C., Sales A gent Sou thern C.

& C. Co............................................................. 793— B urns, M. F ......................................................... 642— Cawood, S. M ...................................................... 299— Christie, D. D ...................................................... 589— Clark. W. D ......................................................... 337— Coryell, J. B ......................................................... 373— Davis, W. L ., A ttorney, L extington. K y. . 863 — Davis. W. O., Secy-treas. K entucky R iver

Coal Co ........................................................... 931— Dennis, J . C...................................................................... 01— Flem ing. R ........................................................... 299— Gage, R .: Gorman, J ....................................... 337— G illham , P . W ...................................................... 227— G raham . L . M ................................................................. 31— Grier. W. T ........................................................... 157— Griffith, W.. Engineer and G eologist............. 180— H anson, I. N ; Huff, J . B ............... .... ......... 31— H arm on, W. W ................................................... 157— H earon, R. L .................................................... .... 409— Henry, E . A ........................................................... 589— H err, C ..................................................................... 553— Hickey. J. P ........................................................... 793— Hill, G. W ............................................................... 589— Jones, S. B ........................................................... 553— K ingm an, W. L ...................................................... 793— Lane, E . E ............................................................. 373— Legg, L . L ., 3 1 ; Leckie, G. W ........................ 191— Lilly, C. M., coal o pera to r killed by elec-

tr ic w i r e ............................................................. 967— Ludlow . E ., M ining and R. R. eng ineer. .*249— McDonald. Sr., D. V. P re s t. and gen’l 752

m gr. L ouisville G. & E . Co......................... 931— M cGary, H. D ........................................................... 589— McGregor. J .. form erly chief inspector of

mines, B. C ........................................................ 897— McQuail, E. J ., T urkey Gap C. & C. Co. 471 — M eehan, J , ............................................................. 445

8 C O A L A G E Vol. 25

O bituary— C ontinued— M organ, M1. R ...................................................... 409— Mu lian, W. C.; McCardell. H. V ................. 553— M urray, F ., Secy. Delaw are & Hudson

Co.......................................................................... 967— 0 ’Connell, R. M., S ou theaste rn Coal Co.. 863— P ark e r, D. H ........................................................ 157— P atte rso n , M. A ................................................ 61— P atton , A. W ........................................................ 373— F inckard , R ........................................................... 191— P la tt, F . E ............................................................. 827— Quinn, W ................................................................ 793— Randall, R. M ................................................... 52— Rhoads, S. H ........................................................ 553— Sillym an, J. S., civil and m ining engineer 931— S-tauffer, H. K ...................................................... 479— Steel. J . G............................................................. 61— Stinnes, H .............................................................. *576— S tru th ers , J., Secy. E ngineers’ C lu b .286. *328— Tedrow, C............................................................... 589— Thom as, D. C., Colum bus, O h io ................. 931— T ribbey, C. A ...................................................... 31— Trounce, J. W ...................................................... 337— W erry, J. T ........................................................... 445— W indatt, W. A ..................................................... 445Officials, Mine— A ttitude tow ard em ployees........................... 46— B roadcasting suggestion (e) ...................... 161— C ertification and com petency ...................... 166— Checking w ork of m ine officials................. 243— L iab le fo r gas b la s ts ....................................... 642— Superin tendent the absolu te b o ss ............ 142Oh, D o c to r! D o c to r! .......................................... 587Ohio— Coal. class o f .......................................................171— Coal consum ption equals p roduction . . . . 142 — Cincinnati coal convention and m achinery

exhib it ............................................................ 607— Cincinnati coal show, To study operating

problem s ......................................................... 468— Cincinnati m usie hall w here convention

m eets ................................................................*539— Cleveland convention, R epublican p la t

f orm; Wooton ............................................ 916— Diversion of business causes lo ss ............ 24— M erger of coal p ro p e rtie s .............................. 49— M iners oppose concessions ........................... 645— Ohio Collieries Co. vs. Hocking- Valley

R y......................................................................... 827— Percentage of full-tim e operation; causes

of tim e lost ................................................. *88— Prices; P ittsb u rg h No. 8 dist.. Cleveland

m ark e t; tab le ; Hocking: Valley Dist.,Colum bus m arket, ta b le ........................... 98

— P roduc tion d a ta ; w orking conditions.m an-hrs., tonnage; tab les ...................... 206

— Suprem e C ourt sets aside Addy conviction 327 — T rustees tak e charge of Jew ett, Bige-

low & Brooks ............................................... 219Oil— A nthracite sa fer and m ore econom ical. . 398 — O il-burning Diesel engine, A pplication to

coal mining: ................................................... 330— Oil circu it breaker, New a u to m a tic ..........*448— P roduction , pas t and fu tu rę ; d iag ram . . *563— Oil versus c o a l.................................................... 885— Sleeve bearingr keeps oil from spatter-

ing m o t o r .........................................................*945— Study oil com petition. Coal w holesalers. . 696 — Teapot-Dom e developm ents; W ooton . . . 219 O klahom a— Coal. Class of .................................................... 171— F a ta l explosion. Forem an liab le fo r . . . . 642 — General shu tdow n of m ines expected. . . . 363 — Leavell s tr ip mine, C utting m achines in .* 4 1 5 “ Old Ben” concen trated stone-dust barrier.*687O ldham stone d u s te r ...............................................*667Open ligrht. th e open road to d isa s te r ............ 675Open-price asso’s opposed by H oover and

Trade Comm.......................................................... 469O ver-rating th e value of ed u ca tio n ............... 458Oxweld Acetylene Co.’s 5-cylinder m an ifo ld . *773

P a in t in coal industry . V alue of; B ro sk y ..* 9 0 1P ain t-sp ray ing grun ...............................................*589P eabody p ic tu re film show s mine explosion. 844 PEA T— H andling p ea t from bogs by p u m p s . . . . 144— W ater in peat, P ressing o u t t h e ................. 10— W hy peat grrew rap id ly when coal was

form ed ............................................................. 293P ennsy lvan ia— Brigrht ou tlook no t fulfllled, P ittsb u rg h ,

*94; C incinnati ...............................................*95— Carnegie In s t. will stu d y coal-m ining

problem s .........................................................315— C entral P enn . Coal P roducers Asso. (e) 1. 20— C entral P enn .. Gloomy o u tlo o k .................... 541— Coal seam s folded in tw o d irections. . . . 466 — Coal seams of P a .. R elative dangers. . . . 613 — Connell8ville coke operation cuts w ages. . 779 — Dept. of Mines urges b e tte r ven tilation

of an th rac ite mines .................................. 287— D istric t No. 2. U. M. W. convention . . . . 467 — F a ta lity ra te s in different seam s; tab les . 613 — F o u r m ines Glen Alden Coal Co. flooded 576 — Freeport-vein o pera to rs sign wage agree-

m ent ................................................................. 575— Lehigh V alley str ik e called o ff .................... 852— Low est accident r a t e ....................................... 388— Mine inspectors discuss rock du stin g . . . .*697— M ine Safety Asso. o rgan ized ...................... 248— M iners convene a t A lto o n a ........................... 395— M iners boom P incho t fo r p residen t. . . . 609 — M itchell m em oriał unveiled a t S cran ton . *852 — More com panies rev ert to 1917 scalę. . 779— More Connellsville p lan ts re tu rn to 1917

scalę ................................................................... 850— No. 9 Colliery, Penn. Coal Co., P itts to n ,

P a .......................................................................... *965— Penna. coals su ited to b a k in g .................... 319— Percen tage of fu ll-tim e operation ; Causes

of tim e lost ........................................*90. *97— P incho t a n th rac ite bill sponsored by

B orah .............................................................. 147

Pennsy lvan ia— C ontinued— P inchot publishes coal exp lo its. . . . . . . . 610— Prices, Boston m ark e t; tab le , 91 ; P itts-

b u rgh m ark e t; tab le . 94 ; Connells-ville coke ............................................ 9o

— P roduc tion d a ta ; w orking conditions.m an-hrs., tonnage; tab les ...................... 207

— Roderick subm its d ra ft of new l a w . . . . 24— Series of explosions in w orking Miller

seam ................................................. 420— Strike one week a t E hrenfeld ad ju s ted . . o4o — Tree p lanting , Coal com panies lead in . . 212 — W age parley in C entral Penn.. 399;

Signed u p ...................................................... ° 01— W alsh w ants m ore inspectors a t same

o u tlay .............................................................. 814Personnel. See also “ C incinnati Convention — Bain, H. F ., To study B ritish accident-

preven tion w ork, ..................................... 850— Baker, J . C., P ioneer mine m anager, W.

...............................................................................*709— Barnum , W., D irector N ational Coal A ssn. *771 — B arre tt, S., resigns, provisional prest.

U. M. W .............................................................. 504— Bates, L. W., E xpert hydraulic eng ineer. *644 — Becker, R. E., Chrm. Program Com., Cin

cinnati, Convention ......................................*672— Berger, V., w ants gov’t to own na tu ra l

resources .......................................................... 848— Besson, L., appointed s ta te mine inspec-

to r, K ansas ..........................................505. *608— Blizzard. W. and Keeney. C. F .. Distr.

presidents; tr ia l ............................................ 284— Bockus, C. E., E lected treasu re r N a t’l

Coal A ssn............................................................. *813— Bovard, H. F ., E lected p resid en t.....................*111— Brooks, E. S., v-prest. and genl. m gr.

U. P. Ry. Co.’s H anna m in es.......................*502— Brophy, J ., re fu tes C la rk .................................. 542— Brosky, A. F ., Vice-chrm. P rogram Com.,

Cincinnati, Convention .............................. *672— Brown, J ., Lord High Com m issioner............. *542— Bum pers, W. A., C ham pionship in loading

coal .................................................................... 738— B urns, F . L., appointed prest. B urns

B ros........................................................................ 575— Burns, M. F ., resigns as president Burns

Bros. Coal C o................................................... *125— B utton, S., goes to Tempie Coal Co............*362— Callen, A. C., P ro f. of m ining engi-

neering, Illinois U niv...................................... 818— Chafin, D., undergoes operation for ap-

pendicitis ........................................................ 503— Clark, B. M., sees gloomy outlook for

Central P a ........................................................ 541— Clemens, I., P re s’t of the Clemens Coal

Co..........................................................................*861— Clements, R., arrested on frau d charge. . 956 — Cochran, I. C., Commissioner Amer.

W holesale Coal A ssn.......................................*918— Cork. A. J ., Secy. B ritish M iners’ U nion. 576 — C ortright, H. K.. P rest. Amer. Wholesale

Coal A ssn.......................................................... *953— Crowell, S. B., P rest. N atl. R etail Coal

M erchants Assoc........................................... *883— Cushing, G. H., philosopher of coal trad e . *884 — Davis, J . J ., Secy. of Labor. to address

m iners’ convention, 52, a d d r e s s ............ 216— Dering, C. L., R e tiring prest. W holesale

Coal A ssn ............................................................. *880— Drennen, E., P rest. W. Va. Coal & Coke

Co....................................................................... .-*359— F arring ton , F ., Union problem s in I lli

nois (e) .......................................................... 519— Fine, A. M., succeeds C. H. Dorrance

v-prest. H udson Coal Co.......................... 51— F ord , H., Buys m ore coal lands, 505;

P u rch ase of dock fac ilitie s ................. 642— G allagher, M., Gen. Mgr. M. A. H anna

Co., Cleveland. O.............................................. *896— Gandy, H. L., E xecutive secy. N ational

Coal A ssn.......................................................... *771— G ilbreth, F . B., Efficiency expert dies in

te lph . booth ................................................. 918— Gray, F. W., appointed asst. to prest.

B ritish Em pire Steel C orp ......................,_*286— Green, F. F ., Supt. V alier Coal Co.,

Valier, 111......................................................... *748— Grimee, R. L., Coal analyses for clinker-

ing tem peratu res ......................................... 401— H arrington. D., leaves B ureau of Mines. 778 — Hatfield, Dr. H. D., operates on Sheriff

Chafin, Logan Co., W. V a ...................... 503— Hoover, Secy.,, denies supporting open-

price assc’s ................................................... 469— H ow art, A., indicted and im prisoned for

strik e cali ......................................................*434— H unt, C. W., succeeds M urdock on T rade

Comm.................................................................. 852— H utchinson, S. P ., P rest. N ational Coal

A ssn........................................................................ *771— Inglis, W. W., P re st. Glen Alden Coal

Co..........................................................................*643— Jennings, W. P., advocates modern equip-

m e n t ..................................................................... *146— Jones, J . E., rock-dust expert tours W est. 780 — K arstrom . C. E., figures in Illinois coal

in d u stry ...........................................................*611— Kelly, nominee fo r prest. A .I.M .E ...............*250— L esher, C. E., resigns as editor of Coal

A g e ............................................................. 33, *136— Lewis, J., a ttitu d e on wages ( e ) .............. 933— L ittle john , W., P re st. Rocky Mt. Coal

Mg. In s t ................................................................ *791— Logan. W. N.. s ta te geologist of In d ian a . *396 — McAuliffe, E., com m ents on 3-yr. peace

trea ty ............................................................... 400— M cFall, R. R., V. p t. and genl. m gr. Uni-

versal Fuel Co..................................................... *710— McVann, E. J ., A tty fo r aF irm on t op

erato ra ..............................................................*468— M agraw , R. M., genl. sup t. U. S. Fuel

Co........................................................................... 505— Manley, W. J ., appointed gen. traffic m gr. 01 — Manningr. Van H.. Pan-A m erican P e

tro leum & T ransport Co.............................*540— Mason. H. D., secy-treas. Coal Ming. In st.

of A m erica ..................................................... *20

Page PagePersonnel— Continued— M orrow, J . D. A. in loader business. . . . 144 — M urdock, V., resigns as chrm . Fed. Trade

Comm.................................................................... 146— Oddie, T. L ., N evada senato r urges Dept.

of Mines ........................................................... *644— Osler, G. F ., speaks on Coal P re p a ra tio n . *672 — 0 ’Toole, J. E., V .-prest. N atl. Retail Coal

M erchants A ssn.............................................. 884— P arker, E . W., D irector A nthracite Bureau

of In form ation ...............................................*493— P inchot, G., Governor of P e n n a ..................*567— R am say, E ., con trib u te s to erection of

Eng. H all, A la. P oly technic I n s t ............ *288— R andall, R. M., Gen’l M gr. Cons. Coal Co.,

M ich....................................................................... *114— Rice, G. S., to address A .I.M .E .................. 144— Rogers, W. D., resigns as secy. N atl. R e

ta il Coal M erchants A ssn ........................... *747— Ryan, J. T., sm ali m ine cars in E uropę

(e) ................................................................................ 34— Saunders, W. L ., elected p rest. United

Eng. Socy.............................................. 218, *252— Sayers, Dr. R. R., chief surgeon U. S.

B ureau of Mines ......................................... *18— Searles, E., speaking fo r Lewis, re s tr ik e . 33— Sm ith. G. O.. Director U. S. Geol. Sur-

yey .....................................................................*917— Snider. G. N., Gen. Mgr. D ickson & Eddy,

New Y ork ...................................................... *881— Steedle, E.. P ro f. of Ming. Engrr. Car

negie In st. of T ech ..........................................*427— Stinnes, H., Germ any’s industria l and

financial leader .............................................*5?6— Stinnes, J r ., H., succeeds to fa th e r’s in-

terests ....................................... ........................ *576— Swetland, H. M., noted Publisher, dies. . 919— T ait, E. W., P re st. Allegheny R iver Mg.

Co., elected to im p o rtan t positions. . . .*217 — Taylor, H. N., heads U. S. D istributing

Corp.........................................................................*505— Thom son, E., to receive Kelvin m edal. . . 641 — Treadw ay, A. T., scores P inchot for an

th rac ite se ttlem ent ....................................... 396— Tryon, F . G., M em ber Geological Sur-

vey ........................................................................*847— W adleigh, F . R., form er Fed. Fuel Dis-

tr ib u to r ................................................. 538. *848— W alker, H., describes B ritish mine law s

462, *538— W alsh, J. J., favors rock d u s tin g ................. 608— W atson, C. W., com m ents on 3-yr. peace

trea ty .................................................................. 400— W eitzel, E. H.. am uses Rocky Mt. Coal

M,g. In s t ............................................................... 436— W heeler, Dr. R. V., and group a t Bruce-

tpn Mine ............................................................*425— W hite, G. E., succeeds M. A. P a tte rso n . . 61— W hite, J. C., indicatingr mine conditions

by tacks on m a p .......................................... 403— Wilcox, F . G., P rice-Pancoast Coal Co. . . *608 — tS118,011, F - inven^or of chain loader. *306 — W ork, H., Secy. of In terior, refuses to

abolish Govt. fuel y a rd ........................... 49— Zern, E. N., reseued when hom e b u rns! ! 364Pickm g tables, see “P re p a ra tio n ”P in c h o fs ph ilan th ro p y to an th rac ite m iners. *566 P ipes and P ip ing— Gaskets, H ints on p ip ę ................................ 183— Thaw frozen w ate r pipes by e lectric ity . *438— Square-end pipę cu tte rs ..............................*660— To cu t slots in spray pipę, Econom ical

way ............................................................. ......... 702— Pipę lines fo r transm ission of gas, (e) 795 — Join tless pipes in a ir transm ission (e) . . 829 — Use of pipes fo r observation in coal

Piles .................................................................... 840— Selecting standard pipes fo r colum ns or

s tru ts ................................................................ 853— How pipę jo in ts can be m ade t i g h t . . . . *853 — Sizes and loads of pipę colum ns; tab le . 853 — Pipe-line transm ission of gas, E stim ated

cost of ............................................................ 951P ittsb u rg h Coal Co.. E a rn in g s ...................... 39tiP ocahontas coal on deck of ship, L am bert »

P oin t p ie r.............................................................. *760P o’es, Allow'tble sweep in wood; tab le . . 766P ortab le elevator loading fired c o a l............ *842Pow er— Novel m ethod to anchor pow er tow ers. . 401 — Superpow er plan, Elec. pow er com panies

join in ............................................................. 467— W here elec. pow er can be saved; Grim es. 472 — Pow er in m ine used or w asted; H oskin. 49o — Percen tage consum ption of pow er a t Ul.

m ines ................................................................ 499— M aking pow er line w ork easy and safe;

K im ball ........................................................... 506— Pow er sta tions a t m ines, ( e ) .................... 65t>— Central power com panies inerease, ( e ) . . 591 — P oor ra ił bonding causes w aste of power.

(e) ................................ ..................................... u tfl— A nti-friction bearings save p o w e r ............ 60(5— Cost of pow er. Diverse opinions o f . . . H32 — Elec. pow er production exceed all re-

cords .................................................................. 642— Smali ligh t and pow er p la n t ...................... *659— Losses due to defectiye electrical equip-

m ent. (e) ....................................................... 662— Stopping pow er leaks on n ig h ts h if t . . . . *678— Inside pow er sta tion ..................................... *R7h— L igh ting a rre ste rs 011 pow er l in e s ............ 680— Coal consum ption in pow er p roduction

drops ................................................................ 738— Saving in pow er to cu t m ining c o s ts ..* 7 5 4 — Can save pow er by slow ing fan m o to r. . 765 — P u ttin g ra ted vo ltage a t face saves pow er

costs ........................................................................00— Can’t neglect pow er q u es tio n ....................... 758— Farrinerton’s 'd re a m -p o w e r p lan ( e ) . . . . 830 P rrp a ra tio n— T hree m ethods in In d ian a t ip p le ............... *233— Dry cleaning of c o a l........................................ 322— Chance flo ta tion system of cleaning coal. 323— \ir - ta b le cleaning. T heory and practice.

A rm s ..................................................................*351— D ry-cleaning tests , ta b le s ............................... 3t>8

January-June, 1924 C O A L A G E 9

— Tum bling rejects and air cleaning freesbone of a 9h. A rm s..................................*421

— Dry cleaning p lant, Wyco, W. V a ............ *421— W asher a t B ritish Coll’y. tre a ts widely

vary ing coals .............................................. *45o— T rapping flat pieces of sla te .................... 461— Picking tables, Clearfield B itum inous

Corp..................................................................... *609— V ibration prevents screen from choking. *660 — Separating an th rac ite fines from im pur-

ities ................................................................. *673— Hansom jig ........................................................*673— Dirty coal, R esults o f .................................... 682— P repare coal on su rfa c e ................................ 699— How to clean and size coal to m aintain

m arket .............................................................*761— How should coal be screened and sized?.*762 — H ow to get lum p coal in place of slack .* 7 6 o — Surplus of fine coal, E fforts to reduce,

(e) .................................................................... 796— Sim plifying th e sizing of coal (e) . . . .

830; (e) 866— S haker screens in a c tio n .............................*93?— Pick ing tables, P ickers a t work o n . . . . *939— R otary dum p ...................................................*939P rices. See also “B ureau of Coal Eco-

nom ics”— Trend dow ngrade fo r 1923; diagram , (e) 66— B itum inous coal. Spot prices; diagram ,

*73, *82; Table ....................................... 110— A n th racite prices fo r eleven years;

diagram .......................................................... *7o— B itum inous prices fo r 18 yr., d iagram . . *83— So. Illinois, Chicago m arket; ta b le .......... 88— Indiana, 4 th & 5 th veins, Chicago m ar

ke t; tab le ..................................................... 89— Penna. Cambria Clearfield, Somerset,

Boston m arket; table ............................. 91— So. W est Y irginia, “ Smokeless,” tab le . . 93— Penna. P ittsb u rg h m ark e t; table, 94;

Connellsville coke .................................... 95— K anaw ha coal, Columbus & Cincinnati

m arkets; tab le ........................................... 95— K entucky, E astern ; C incinnati & Chicago

M arkets; tab le ....................................................... 97— A nthracite , Reason fo r h igh prices,

P a rk e r ............................................................. 145— Low-price period, Mines th a t will survive,

(e) ..................................................... ............. 378— P rice differential evidence of competi-

tion ................................................................. 496— Need of one-price policy in mine sup-

plies, (e) ...................................................... 626— New prices a t M ilwaukee, ta b le ............ 696— A nth rac ite c ircu lar prices, New York,

table . . ............................................................. 696— New Y ork an th rac ite circu lar prices;

table . ............................................................... 884P roduction . See also “W eekly Review .”— M achine-m ined coal, Great B rita in .......... 14— U. S., Grt. B ritain , Germany, Belgium,

France, W orld ............................................ 43— D iagram of p roduction and consum ption,

1923. (e) ....................................................... 65— N atu ra l gas production and consum p

tion .............................................................................. 72— B itum inous production, weekly, 92; Year

1923; tables .................................................. 505— W est and Southw est, M arket life le ss . . . *100— N orthern W. Ya. exceeded 1920 produc

tion ..................................................................... * 10 1— Coal production . 1921-1924, Grt.

B rita in , d iagram ........................................ 104— A laska coal o u tp u t increased ....................... 109— Holidays, Effect on production .................. 116— P roduc tion losses a t t ip p le ......................... 137— Cement ........................................................ 185, 364— Coal tonnage per m an v a r ie s ...................... 204— S trip pits. P roduction 1922; tab le ton

nage, Men, shovels..........................................250— Coal produced 1890-1922; ta b le ................ 287— M iner and m anager each ham per produc

tion ..................................................................... *383— Downward trend in R u s s ia ........................... 387— New River o u tpu t ju m p s............................ 398— Briąuets, Record o u tp u t in coal ............ 398— P rice o f coal to cost of production, Rela-

tion of ............................................................. 428— U. S. Steel Corp. coal o u tp u t jum ps 42

p er cent ............................................................ 470— W orld’s coal o u tp u t 1921, 1922, 1923;

tab le ................................................................. 471*— Im proved m ethods and equipm ent increase

production ........................................................ *521— Strike (1922) curta iled production; tab le. 538 — B itum inous estim ated ou tp u t, by sta tes;

tab le ................................................................. 542— Gas and oil, past and fu tu rę ; d iag ram . . *56^— Coal o u tp u t in F ra n c e .................................. 611— Germ an m ines, P re -w ar o u tp u t ................. 698— U. S. b itum inous (1 9 2 2 ), S tates and

classes; tab le .............................................. 698— B itum inous coal m ark e ts show little

change ................................................................*741— E stim ates o f production . coal and coke. *741 — W ashington hopes to b ea t la s t y ear’s

record ............... ,............................................... 782— V arying estim ates of coal stocks show

need of accu ra te consum ption d a ta ;W ooton ............................................................ 849

— Production , im ports, exports, consum ption, Germ any ..................................... .. • . 953

— W orld’s p roduction , 1923, largest sińce1 917; tab le ..................................................... 955

P rofiteering (e ) ..................................................... 341Progress in in d u stry ( e ) ............ ............ . 829P ro tec tiv e a p p a ra tu s fo r su bsta tion equip-

m ent ....................................................... .................*701P ro tectom eters to detect h ea tin g in coal

piles ......................................................................... 841P u b lic ity a he lp to any industry , (e) . . . . 591 P u b lic ity th a t h arm s th e coal industry ,

(e) ........................................................................... 899P um ping and D rainage— Standard* in design of p u m p s ................... * 1 1

PagePum ping and Drainage— Continued — Capacities under various heads, T able. . 12— C entrifugal pum ps, Specifications for . . 12— Pum ping peat from b o g s............................. 14*— Siphon draw s a ir yet w orks continu-

ously ................................................................. *150— Tracing source of w ater flowing into

m ine ................................................................. 181— U nderground pum ping, *308; Two types

of pum ps ..................................................... 309— A utom atic suction valve ............................. *302— F ire pum p, Approved single-stage..........*34v— Corrosive mine w ater, To resist action

of ...................................................................... 402*— Wood vs. lead-lined p ip ę ................................ 402— Acid-resisting valve for reciprocating

P um ps ............................................................ *41&— Self-contained gathering pum p, *412;

P um p m otor ................................................ *412— Centrifugal pump, Weil ba lanced ...............*482— C entrifugal pum p, Repairing o ld ...............*50tt— W aste stops leak in pum p l in e .................. 509— Relief valves prevent breakage of

pum ps ..............................................................*581— C entrifugal pum p m ore efficient................ 615— G athering pum p; V itreous china cylinder.*772— P am p casing salvaged a t Iow c o s t..........*853— New ball-bearing pump. Smali single-

cylinder ..........................................................*864— Splash-lubricated mine gathering p u m p . . *967’ P yrite cause mine fire, Does oxidation o f . . 609

Queer nam es of mines, .................................... 151

RRadio— Radio in m ine ...................................................*358— Radio antennas. Rules fo r .......................... 507— M ine-rescue radio, R equirem ents o f . . . . * 5 2 9— M ine-to-surface tes ts .................................... *801— P o rtab le m ine app ara tu s ...........................*802— B ureau of mines experim ental laboratory .*803 R ailroads. See also “Transportation**— Conference on R .R . problem s, ( e ) . . . . l , 17— P riv a te car owners vs. R .R ........................ 29— H igher N. Y. rates, h e a r in g ...................... 29— W estern M aryland Ry. p ier electrically

operated ......................................................... *48— R aił coal consum ption ................................ 50— M onongahela Ry. adds tr a c k s ................... 6 r— Soo coal traffic d oub les.................................. 61— Mines supply 60 per cent of freigh t

moved ............................................................... 122— N orfolk & W stn. Ry., Heavy traffic,

122; E arnings. 191: Buys new cars, 299 — Louisville & N ashville R.R. gains 12 per

cent ................................................................... 157— Broadcasting system proposed ................... 16T— New Y ork Central loadings h eavy . . . . 191— B. & O. prom otions ................................227, 337— C. & O. repairs coal cars, 263; P u ts on

new locom otives, 337; Breaks loadingrecord, 445 ; Builds new c a r s ................. 515

— Conemaugh & B lacklick R .R . w ants tobu ild 16-mi. extension in P e n n .. .2 9 9 , 409

— So. HI. & Ky. R.R. to bu ild line, Edge-wood. Dl. to F u l ton, K y ........................ 337*

— Coal R iver & E astern Ry. seeks bondissue .................................................................. 337

— Consum ption declines, Coal ...................... 363— Frisco to bu ild 9-mi. cu t-o ff...................... 4 0 9— S outhern roads p lan b e tte rm e n ts .............. 409— Pennsy to tak e over N. & W .: th ree w ant

the road ........................................................ 43 (T— Storage p lan help to R .R .’s ...................... 469— C entral Ind . R.R. in b e tte r condition . . 479 — Lehigh & W ilkes-Barre Coal Co., pay

dividend ........................................................... 504— P ro te s t conditions of Clinchfield lease. . 515 — L ehigh Valley control of D. S. & S. R .R . 515— R ailroads order m ore c a r s ............................. 515— V irginia Ry.. Incom e c lim b s...................... 515— Jefferson S outhw estern Ry., 535; Gasoline

passenger car .............................................. *536— R ailroads refuse to join Coal E xport

Com .................................................................. 538— C. & O. buys th ree sho rt l in e s ................. 553— H linois Central R .R . builds b ran ch . . . . 589— C. & O. new eq u in m en t................................ 607— R ailw ays m ay get F uel R esearch B ureau. 608-1—Coal consum ption ............................................ 6 10— Roads b reak traffic reco rd s ...................... 610— Rock Island engine fueled w ith m ilk

b riq u e ts .......................................................... 645— Bier equipm ent order, Apply to I . C. C.

fo r ..................................................................... 695— G reat W estern d istu rbs N o rth w est.......... 711— R ailroads m ust provide facilities for

sh ippers ........................................................... 749— R ailroads speed ud fre igh t m ovem ent. . 782— Econom y in use of coal u rg e d .................... 814— H ooking Valley Ry., Com plaint of Ohio

Collieries Co.................................................... 827— Railroads indorse m ove to “ Ship coal

now " ................................................................. 851— P ittsb u rg h & W. Va. Ry. to segregate

coal p roperties ............................................ 882— R ailroads and coal m en should b u ry the

axe ..................................................................... 884— R ailroads buy 28 per cent of soft coal

o u tp u t ............................................................. 955Ransom jig ..............................................................*67.?R aton coal equal to th a t from Ohio. . . . 630 Reflector fo r h ighly concentrated l ig h t . .* 8 2 7Reliance-H atfield Cos. m erg er........................... 734R epair shop and storeroom . U nderground .*814 R eorean iza tion o f s ta tis tica l b u reau s diffi-

cu lt ......................................................................... 952R esu lts of study of corrosiye action of

m ine w ate r ......................................................... 402R eta ilers in annual convention decry Govt.

in terference w ith coal ................................ *883

R etrenchm ent policy m enace to co-operativeen o rt; W ooton .............................................. 735

R heolaveur or Rheo-w asher ......................* * 677)R u h r coal strike se ttled ........................ 849Rock D usting. See also “ D ust” and

“Explosions, M ine”— To prevent mine explosions,. . 350, 418,

T „ 425, 463— .Lignt colored dust p re fe rred .................... 463— W alsh favo rs rock d u stin g ........................ i 608— Rock d u st in cem ent gun, Use o f . . . . ’ 627 — B atteries in Phelps-Dodge Corp. m in e s . .*628 — Cement p lan ts fu rn ish rock dust for

b arriers ..................................................... (550— Stone-dust b a rrie rs ............................ . . .* 6 6 4— D istribu ting stone dust, Three m ethods

665; Oldham stone duster, 667; Blower, *685-6; Old-Ben concentrated stone-dust b arrie r ............................................... 68?

— Mine inspectors (P a .) discuss rock dust-^ x................................................................... *697— Cost of rock du st; am ount needed. . . . 700

— Keeping m ines free from dust explosions:Stone dust, quan tity per mile; Rockdust in stem m ing helps; W etting moreexpensive ........................................................ 7̂ 59

— Rock-dust expert to u rs We s t . . . . . . . 780— Rock dusting recommended as standard

practice ........................................................... 808*— K ight k ind of rock dust h a rm less .......... 808— Rock dust a preventive of coal-dust

explosions ....................................................... 814— Rock dust b e tte r and less costly than

sprinkling ....................................................... 842— Kind of dust to be u se d ............................. 876— Rock dust extinguished seven explosions.*907 — Rock dusting Phelps-Dodge mine, N. Mex.*903— Com pressed-air dust blow er ...................... *9lT)— Rock dusting low ers insurance ra te :

B utterfield ..................................................... 919Roof fa lls m ore frequen t a t n ig h t ............ 464Ropes— Cable splicer ...................................................... *64— W ire ropę, P ro tec t against corrosion . . . 310 — M agnetic test applied to ho isting ropes. . 323 — M anufac ture and use of w ire ropes,

Prolonging life in .....................................*872— Twin-rope skip ho ist w orks w e ll..........*933R otary converter, See “ E quipm ent E lectrical”— R otary dum p. T herm al (111.) No. 4

m ine ..................................................................*939R ussia— Dow nw ard trend in p ro d u c tio n ................. 387— Coal o u tp u t h ig h e r ......................................... 735

SSafety— B etter law s needed to m ake m ines safe. 56— B arricades save lives .........................*150, 242— Safety by radio ............................................ ' 17 9— Safe m anner of tes ting fo r elec. charge. 183 — To prevent slippery floors, Sans-slip. . . 194 — Trade associations and stone dusting,

. (e) .................................................................... 231*— Mine Safety Assc. organized in Central

Penn ................................................................ 248— New safety film fo r B ureau of M in e s .. 250 — Safety service w ork, B ureau of M ines. .

t™. , , 321, 325— W ho s who in sa fe ty ..................................... 324— Safe dr a w in? of mine t im b e r .................... 292— U. S.-British co-operation fo r m ine safety . 328— Expense sheet, C utting down, ( e ) .......... 342— N ational Safety Council to m e e t................ 504— M aking pow er line s a fe ................................ 506— Safety earns m en fo u r tim es w h at it

sayes com pany ............................................ *528— M aking app lication of electricity sa fe ;

Hsley ................................................. ..............*56!*— W hen is e lectricity s a fe ? .............................. 565— U tah adopts 100 per cent sa fe ty code. . 573 — Coal seam s of P a., R elative dangers. . . 613 — Progress slow in “ Safety firs t,” (e) . . 625 — Safety-first bulletins. Phelps-D odge C orp .*629— F-ameness in sa fe ty -firs t ta lk s ....................... 63T>— Good tam ping affords sa fe ty in b last-

^ i n g ................................................................... 646— Stone dusting a m eans of reducing

fa ta lity ra te ; R itson .................................... *663— Open light, the open road to d isa ster. . 675— D riving room s u p p itch , D anger in . . . . 700 — Safe gas lim its— W heeler vs. W alker,

(e) • • ................................................................... 714— House safe ty hearings to form model

m ining law ...................................................... 851— Safety m ovem ent gains headw ay in

U tah .................................................................... 881— To resum e safe ty hearings. Bill embodie9

B ain’s p lan ...................................................... 88fi— To tra in m iners in sa fe ty ............................. 917— O perators and engineers to s tudy m ine

safe ty .................................................................. 918— M aking elec. equ ipm ent safe to u s e . . . *921— S afety m easures discussed at E lkins,

W. V a................................................................. 949Safety Lam ps— F ia t or round w icks best in u s e . . . 46— Gas ind icato r “ m ethanom eter” to replace

safe ty lam p ................................................... 403— B urn in fa ta l CO a tm o sp h e re ...................... 640— B ritish law s reg u la te hand ling lam p . . . . 80tf Sand-flo tation fo r poor coal: C hance . . . . *633 Screening. See “P re p a ra tio n ”Screens. L um p .......................................................*762Self rescuer from carbon m onoxide............ 420Selecting best type of fa n m o to r ................. *722“ Serfdom ” of m iner is p a s t ........................... 642Serious dam ages from h as ty rep a irs to

resis tance grids ..................................................*401S h afts— Cables in sh a fts . I n s ta l l in g ......................... 22— L in ing sh a ft w ith p recast c o n c re t1. . . . *437 — Wood vs. conerete in sh a ft lin in g ............. 492

1 0 C O A L A G E Vol. 25

Shafts— C ontinued— Concreting ho isting sh a ft while in opera-

tio n ; Pow ell ................................................. * 6 l£— Freezing process to sink sh a fts in no rth

B elgium ; B iquet ..........................................*831— S h aft bo ttom T herm al (111.) No. 4

m ine ....................................................*938, *940ShaJe d u stin g spreading rapid ly in Illino is;

Jones ...................................................................... *883S hanktow n explosion evidences need of

sa fe ty ....................................................................* 4 iyShipm ents— B itum inous coal, D estination; tab le . . . . 8U — A tlan tic seaboard sh ipm ents, 1923, dis-

a s tro u s .............................................................. *93— Decline in D u lu th sh ip m en ts ...................... 109— L ak e E rie sh ipm ents of b itum inous coal;

tab le .................................................................. 112'— P enna. Coal Co. record daily o u t p u t . . . 146 — Two m ethods of shipm ent a t Ind iana

mine .................................................................*233— R iver sh ipm ent in m idwest reduces cost.*240 — U. S. coal exports, Dec., by custom s

d istr .; tab le .................................................. 250— Q uality of coal sh ipm ents and deliveries,

(e) ..................................................................... 267— B itum inous coal loaded a t L ake Erie

ports; tab le 734 ....................................... 882— Shipper not liable fo r fre igh t, except by

con trac t ........................................................... 749— Loading barges on Hudson R iv e r ..........*779— Coal o u tp u t, exports, im ports. consum p-

tion, C anada ................................................. *780— Foreign shipm ents of coal ( e ) ................. 865Signal System s. See also “Telephone,

M ine”— T. P . S. m ethod .....................................499, 530— Transm ission of signals by ground con-

duction ; Jakosky ....................................... *529— M ethods investigated , ap p ara tu s, e t c . . . . *530— F acto rs affecting s ig n a lin g ........................... 532— Voice transm ission underground, P rogress

in ; Jak o sk y ................................................. *80x— Sink electrodes below ground w ater. . . 94JSilica in stone dusting. 350; N ot alw ays

harm fu l, 417; Aids tubercu lo sis ............... 461Sleeve bearing keeps oil from spattering

m otor ....................................................................*^45Snowbirding, M idwest dealers still figh t. . 956 S outh W ales coal seam s folded like Penn.;

Hall ........................................................................ 466S outh W ales coal region chief com petitor

of A m erica; W illiam s ......................... • • • *726Spraying system , Phelps-Dodge Corp. mines. 628 Stable, Mine— Concrete stable ................................................*561Steam Shovels, See also “Loaders and

Shovelers”— F a rth e s t north . L at. 79 deg. N . . i .......... *14— M am m oth shovel in s tr ip p in g ....................*128— Steam shovel and conveyor in stripp ing . *83v— F irs t revolving steam sh o v e l...................... *83TSteel— H eat treating , W augh com parascope fo r .*160 Steeply p itch ing coal beds u ndercu t by

m achinę; Schloss ........................ :.................. *461Stock room beggars owner. B u lg ing ........... 757Stone dusting . *663; Fineness im p o r ta n t . . 666S tra ig h t Creek coal (K y.), Car o f ................. *766’S tripping— O perations gro w in K y ................................*1— Biggest producing m ine in S o u th w est. . *415 — E arly s tripp ing fu li of h eartb reak ,

Holmes ...............................................*797. *835— Large 15-ton dum p car cu ts cost of

stripp ing ..........................................................*828S torage of coal, See “ Coal S to rage”Storeroom and repair shop u n d e rg ro u n d . . *844 Surveying, See also “Maps and Surveys”— Tapes and splices .......................................... 271Survey show s m any Illinois m ines generate

own electric ity ; H oskin ................................*631

T axes— Taxes w ill n o t be reduced. Unless public

acts .................................................................... 600— P aying taxes on idle lands, ( e ) ................. 62p— Coal T axation in K en tu ck y ..................... 643— Coal men h ea r ta lk of taxes, trade

groups and Govt. c o n tro l......................... 736Technical men, Need of ( e ) ......................... 829Telephone. Mine. See also ‘‘Signal System s’*— Com m unication system s. F u tu rę .............. 139— Keep m oisture from telephone................ 255— Com m unication, P rogress made in mine. 499Tennessee „ _— Coal, Class of ................................................... 171— W age cu ttin g in eastern Tenn. and sou th

eastern K y....................................................... 329Texas— R etailers eonvention urges sum m er buy-

ing ............................................ .. ■ . . . . . . . . . 849Theory and prac tice in a ir-tab le cleaning

of c o a l; A rm s ....................................................T hings no t a lw ays as they seem ................. 57dT im ber and T im bering— Safe draw ing of tim ber ........................... ZS i— P reserv a tio n o f wood and refo res ta tio n .*491 — P la n tin g trees fo r tim ber supply; K ings

ton Coal Co......................................... .. • • • .*493__Q uan tity o f tim ber used in soft-coal

m ines ................................................................*»>63— H eavy tim bering . M ain h au lage ro a d ..* 5 6 4— Reserve. G row ing m ine tim ber o n ..........*565__S tra igh t-face w ork, m achinę m in ing . . . . *602__T w ist-props loose instead o f pulling

them ................................................................. *647T inning stranded copper beyond su p p o r t .. 402 T ipple design. M anagem ent should fu rn ish

d a ta : Brosky .................................................... 834Tipple. In te rio r of b itu m in o u s ...................... *704T rack ing— T rack tle in one p iece .................................. *590— Size o f steel re ą u ire d ..................................... 638

T racking— Continued— T rack arrangem ent fo r m achinę loading. *689— Cast-steel m ine f ro g ..........................................*773— G uard-rail clam p ............................................*774— B razing bond to ra ił ..................................... *774— Sw itch lock installed .....................................*776— Fishp late holds ra ił and tie in posi-

tion ................................................................... *828— M etal track tie, A n o th e r ............................. *863— R erailer th a t holds itself firm ly in posi-

tion ................................................................... *897Trade— Coal Exchange needed, ( e ) ........................ 1— Coal Sales, Short-line ways of handling. *7 — T rade figures, P ub lic ity o f . . . . l 9 , 111, 286 — O utlook fo r 1924, A m erican S ta tistica l

A ssc...................................................................... 62— Tidew ater coal business in crease ............... *79— R aił ra tes ham per export t r a d e ................. 79— Average coal ra te s to cen tra l m arkets;

tab le ............................................................... 80— M arket review s; B attle in N orthw est. . *87 — New England b itum inous trade 1923. . *90 — Midwest suffered Iow m arket 1923; P ro

duction h igh ................................................. *97— W ould forb id dissem ination of trade

d a ta ; H oover-D augherty correspond-ence ......................................................... 1 1 1 , 286

— M aynard Coal Co. vs. Federal TradesComm............................................ , .................. 114

— B ritish co-operative coal trade gain ing . . 282 — Official a ttitu d e on trad e s ta tis tics;

W ooton ............................................................ 360— Issuance of trade in form ation . No move

to preven t ..................................................... 364— T rade sta tis tics, L egality o f; W ooton. . 399 — Advises issue of trade sta tis tics, Judge

W illiam s .......................................................... *34— Coal exporters p ro test ra te s on U. S.

sh ips ................................................................. 468— New Y ork dealers d iscuss bu rn ing topics. 468 — Cham ber of Commerce to discuss trade

associations ................................................... 611— A tty . General to study trade d a ta . . . . 696 — T rade associationism saving coal in

d u stry .............................................................. *737—-“Buy coal now ,” H oover le tte r to trade

bodies ............................................................... 738— Tim ely topics. W holesalers conven tion . . 738— Trade association, Need of, ( e ) ............ 752— H ardw ood men to compile trade d a ta . . 778— U nusual situ a tio n in coal t r a d e ............ 812— Snow -bird re ta ilers troub le t r a d e . .......... 818— E astern coal re ta ilers scan trade prob-

lem s ............................................................. *£9— Trade com m ission, H u n t succeeds Mur-

dock on .......................................................... 852— A tty . Geni. S tone’s a ttitu d e re trad e d a ta

p u b lic ity .......................................................... 882— Helps to hołd trade, ( e ) ........................... 933— E very stockholder a coal se lle r............... 953T rade Commission— Calif. R e ta il D ealers Assc. accused, 144;

Deny charge ................................................. 179— M adeira-Hill Co., Charges of price con-

sp iracy dropped .......................................... 2 18— A u th o rity lim ited, says Suprem e C ourt. . 434— H am pered fo r lack of fu n d s ...................... 436— Open-price associations opposed by Trade

Comm.................................................................. 469— Bill lim its action to probes au thorized

by law ............................................................. 502— N orthw est re ta ilers charged w ith u n fa ir

com petition ..................................................... 578— Charges F ra n k lin Coal Co. w ith u n fa ir

m ethod ............................................................. 882T ransfe r of Min. Resources Div. to Census

B ureau m eets opposition; W ooton .......... 885T ransform ers— Design fo r 2.200 vo lts dangerous on

4 .000-volt line ............................................ *148— Bank of transform ers, Lewis m ine (W.

V a.) ................................................................... 343— H igh-voltage transfo rm er su b s ta tio n . . . . *632— U nderground transfo rm ers ...........................*759— Meet m any requirem ents ........................... 864— Elec-arc welding. h igh-current secondary.*864 — Voltage transfo rm ers stu rd ily b u ilt . . . . 888— T em perature indicator ................................. *931— Location of transform ers ........................... 950— Theory of transfo rm ers ............................. *958T ransp o rta tio n , See also “R ailroads” “C ars’’

“Conveyors”— P riv a te ca r ow ners vs. Assigned-car .

case ................................................................... 29— P riv a te cars an advan tage in So. W ales. 4T — N ation’s economic fu tu rę depends on

tran sp o rta tio n ............................................... J15— A nti-friction bearings low er c o s ts ..........— L ake n av igation o p en s .................................. 610— Roads b re a k traffic reco rd s ........................... 610— H earings before I. C. C. a t W ash ing ton .. 641 — B etter m a i n -1 i n e tran sp o rta tio n for

loaders ...................................................... • • * 2 ??— T u b u la r coal ch u te ....................................... *715— G ravity p iane ................................................... *2 ł ?— Econom y in tran sp o rta tio n , (e) ............ 763— Coal aw aiting tran sp o rta tio n by barge

on H udson ....................................................*782— B oarding car doors. A llow ance f o r .......... 793— T ram b u ck e t fo r dum ping m ine r o c k . . *794 T uberculosis, How silica a id s ........................... 461

Union vs. non-union fields, ( e ) .................... 661U nited Mine W orkers— Opposition to Lew is rógime, (e) ............... 2— W age reduction and str ik e q u es tio n . . . 19, 20 — Union vs. non-union m ines, in desire for

strike ................................................................ 33— Greeted w ith dynam ite in K y .................... 115— Renewal of agreem ent p ro b a b le ............... 143— F inances im proye ............... .................... .. • • 143

PageUnion Mine W orkers— C ontinued— U nited m ine w orkers and R e d s................. J61— R adicalism defeated, (e) ............................. 162— Union fav o rs loading m achines, Lewia

says, (e) ...............................................161, 177— Im p o rta n t Convention ac ts ......................... 177— Difficult s itu a tio n in no rth ern W. V a .. . 180— Wage scalę and th e public, ( e ) ................. 196— M iners w an t 4-yr. co n trac t; R eport of

scalę com ........................................................... 213— M ain acts o f conyention ............................. 214— P repared to fight P in ch o t b i l l .................... 250— Check-off paym ents, L arge m onthly ;

, tab le ...................................................................262— John Rex” still ru les, (e) ........................ 268— W age con trac t renew ed fo r 3 y r .. .28 4 , 329— Keeney tr ia l to precede th a t of B lizzard,

284; Change of venue a sk e d ................. 328— U nionism will learn, (e) ........................... 303— Convene a t A ltoona, P a ...................... 395, 433— D istrict 19, w est Ky.. m ay go non-union. 397 — D istric t No. 2 indorses B rophy rep o rt.. 433— W ashington m iners sign 3-yr. co n trac t. . 433— N ova Scotia, The union in, ( e ) ............... 449— Jacksc)nville agreem ent, H eavy union

m ajo rity for, 467 ; M iners ra t ify . . . . 601— W yom ing signs up .......................................... 467— W estern Ky. problem , ( e ) ............................. 484— A greem ent, 3-yr., signed in P h i la ............ 501— Open-shop pac t w ith Ky.-Tenn. A ssc. . 502 — W age agreem ent fo r no rthern W. V a . . . 604— B a rre tt resigns in E astern C an ad a ............ 504— F arrin g to n and Union problem s in

Illinois, (e) ................................................. 619— Lew is and the fu tu rę , ( e ) ......................... 556— Union dom ination, W. Va. coal fields

free from ........................................................ 609— Union rebels still fighting for H ow at. . 610 — Union and non-union territory , (e) . . . . 625 — U nion official resigns; blam es outlaw

strikes . . . . t ................................................. 696— Union vs. non-union mines, ( e ) ............ 713— H ow at a t w ork w hile aw aiting rein-

s ta tem en t .......................................................... 783— Illinois union c u r t a i 1 s F arrin g to n ’s

pow er ................................................................ 862— Lewis suspends autonom y of W. Va.

union ................................................................. 916— Union dem ands dism issal of tow n of-

ficials .................................................................. 918— Lewis to probe an th rac ite ou tlaw strikes 919— Lewis a ttitu d e on wages, ( e ) .................... 933— Lewis w arns against wage reductions. . 962 — O utlaw strikes a ttr ib u ted to disbelief

in God ................................................................ 956United States— Federal departm ents. R eorganization . . . *18 — Dept. of Commerce vs. Dept. of Justice . 19 — Dept. of Mines. Urges. (e) 33, 51; In-

dorsed ................................................................360— Judgm ents, New R iver Coll’s Co. vs.

U. S., N avy co a l............................................ 116— Federal inspection of coal deliveries, (e) 304 — P rofits taxes, H ow rated ; Sec.’s of

Revenue A ct ................................................. 316— U. S.-British co-operation fo r m ine safety . 328 U nloading p lan t on Ohio River, a t Cin-

c innati .................................................................. *895U tah— Explosion in Mine No. 2, U tah F uel

Co................................................... 395, *431, 471— Great W estern Coal Mines Co. and

Dempsey ............................................................. 398— A dopts 100 per cent safe ty code ............... 574— U tah com pany uses top cu ttin g success-

fu lly ; S troup ...............................................*§^9— Safety m oyem ent gains headw ay in U tah 881

VV alves— L ight-w eigh t elec. valve g r in d e r.................. *160— A cid-resisting valve ...........................................*775V entila tion , Mine. See also “F an s and

B low ers”— H um idify ing air, P rinc ip les th a t under-

lie ......................................................................... 185— R egula ting flow of a ir a t foo t of sh a ft;

Dabney .................................................................*579— Theory and p ractice of mine ven tila tion ;

Bryson ............................................................... 804— Removed v en tila tin g tubes; explosion

follow ed ............................................................. 944Virginia— Coal. Class of ...................................................... 171— P roduction d a ta ; w orking conditions;

M an-hrs., tonnage; tab les ........................ 207— Valley coal fields of Va. v s. P a . a n th ra

cite region, *269; Valley field difficult to w ork .............................................................. *311

Wages— Wage problem s and wage scalę in

E uropę ........................................................................ £3— B itum inous wage parley .......................................... 64— Wage agreem ent in G reat B r i ta in ........................ 66— Low wage of non-union m ines, Effect

of, (e) ............................................... .. • • • • • 195— W age conference in F lo rida , ( e ) . . 2 3 2 ,

248, 251— W age co n trac t renew ed fo r 3 yr., 284 ;

H igh-cost o pera to rs fear. 28 7 ; Stabil- iza tion assured, W ashington view, 329 ;Hoover. 362 ; O ther co m m en ts.............. 400

— W age cu ttin g in sou th eastem Ky. andeastern T enn ..................................................... 329

— W age-scale and price trend, ( e ) . . . . . . 34xi— W age parley fa ils in K anaw ha d is tr ic t. . 360— W age parley in C entral Pennsylvania ,

399, 467— W age agreem ent rejected by N ova Scotia

m iners ................................................... .. . . . . 399— B ritish m iners re jec t 10 ; a sk 20 p er cent

increase ..................................... ....................... 433

January-June, 1924 C O A L A G E 1 1

PageWagres— Continued— Wage troubles vex E ast Ky. flelds; Dead-

lock in W est Ky. wage p a rley . . . 433, 504 — N orthern W. Va. wage scalę, Baltim ore

conference ............................................. 434, 468— Georges Creek m iners accept wage cu t. 470 — E ąu itab le wage still an open ąuestion,

(e) .......................................................... 483, 539— AgTeement reached in N orthern W. V a.. 504 — Agreement in K anaw ha field deferred. . 504 — Southw est fields suspend pending- wage

settlem ent ....................................................... 504— New R iver field. No wage adjustm ent

in ........................................................................ 541— Report of Comm. on an th rac ite m iners’

earnings .......................................................... 566— W est K entucky, M iners refuse wage cu t. 575 — Wage agreem ent signed fo r “F reeport

vein” ............................................................... 575— U pper K anaw ha wage parley en d s ............ 576— Miners of southw est renew scalę for

3 y r .................................................................... 696— Lincoln C. & C. Co., lower Connellsville

cu ts wages ................................................... 779— “ No cut while contract ru n s,” L ew is. . 812 — R eadjustm ent of 3-yr. wage agreement,

Bradley foresees ......................................... 81i>— More Connellsville p lan ts re tu rn to 1917

scalę ................................................................ 850— M echanization, Effect of, ( e ) ................... 865— Standard ization of wages. ( e ) ................. 865— M iners’ wages and th e cost of coa l . . . . 871— Lew is a ttitu d e on wages, ( e ) ................... 933— Lew is w am s against wage reauctions. . 9553 W ashington, S tate of— P roduction of coal, 1923; ta b le ............... 28£— O perators sign 3-yr. c o n tra c t ..................... 433— Hopes to beat las t year’s o u tp u t ........... 782W asher a t B ritish colliery trea ts widely

vary ing coals ...................................................*455W aste-sa tu ra ting tan k fo r m ine serv ice. . *916 W atch fo r breakdow ns before they affect

purse ..................................................................... 758W ater— Analysis of mine w ater; ta b le .............. 365— Com position and corrosive effect of m ine

w ater ............................................................... 365— H um idifying mines. Q uantity used; tab le . 387 — Corrosive action of mine w ater: Acid

neutralized w ith lime, 402 ; Monel m etal, acid resisting ................................ 412

PageW ater— Continued— W ater as a preventive of m ine explo-

sions, (e) ..................................................... 414— P roportion to m ake coal dust sa fe . . . . 425 — W ater Cartridge in blasting coal and

breaking concrete .................................... *508W augh com parascope fo r heat-trea ting

Steel ...................................................................... *160W eightograph; A utom atic weighing device.*77o W elding— Five-cylinder oxygen m an ifo ld ................... *773— L i?ht-w eight welder, 500-600 v o lts . . . . *194— M etal-electrode welding ............................... 702— Mine tru ck fo r welding outfit, *365;

Truck, m ounted arc-welding out f i t . . . *968 — P o rtab le welding ou tfit w ith m any taps. 898— T herm it welding, how done ...................... 581— T raining oxyacetylene w elders................... 171— T ransform er fo r arc-w elding......................*86 v— Welded mine ind icato r (sign box) made

of steel ........................................................*888W est V irginia— Beckley coal bed, L im itations and eccen-

tric ities; S tahl ............................................*485— Coal, Clas9 of ................................................... 171— Coal m ine developm ent.................................. 247— Company doctors in W. Va. fie ld ............ 24o— Explosion in No. 2 mine, Y ukon Poca-

hon tas Coal Co.............................................. 502— Growth of coal fie lds.................................... 609— I. C. C. vs. New R iver Co. e t al., Appeal

advanced ........................................................ 445— Keeney case, M urder of deputy sheriff. .

398, 468— Keeney, Mooney & B lizzard indictm ents

nolle pro88ed ................................................ 919— Machinę m ining gaining ............................. 538— M onongahela field adopts 3-yr. agree

m ent ................................................................ 541— Need of rock dusting. Will u rg e .............. 730— New production record in no rthern d ist..* 1 0 1— New River o u tp u t ju m p s ............................. 398— New R iver field. No wage a d ju s tm e n t. . 541 — N orthern operato rs oppose agreem ent. . 396 — Non-union opera to rs deny charge of in-

stiga ting strike .......................................... 51— Percentage of fu ll-tim e operation; Causes

of tim e lo s t ..........*92. *93, 96, *102. *105— Prices* Colum bus & Cincinnati m arkets:

table .............................................................. 93, 95

P ageWest Virgrina— Continued — Production da ta ; W orking conditions,

M an-hrs., tonnage; tab les ............... 204— Supreme C ourt of A ppeals decides eric-

tion su it ....................................................... 470— To resum e W. Va. in tra s ta te ra te hear-

ing ............................................................. 897— Union conditions fav o r Ohio opera to rs .. 50— W age agreem ent reach ed ............................... 504— Wage agreem ent K anaw ha field deferred. 504— Wages and m ining ....................................... 734— W est Y irginia Coal & Coke Co. im prove

eąuipm ent ...........................................*197— W. Va. P ublic Service Com. moves to

protect coal r a te s ................................... 299W hat an th rac ite region is doing to m ake

fines salable .................................................*673W hat is the relation of cost of production

to price of coal; W ing .................................. 428W hat rock in coal m ay d o ............................. 682W holesalers’ convention indorses move fo r

coal in stitu te ............................................ ..... . . *880Wood poles, A llowable sweep in; tab le . . 766Wood preservation and reforestation ad-

yances; A. I. M. E ...........................................*491Wood vs. concrete in sh a ft lin in g ............... 49^W orking Conditions— Advancing room -and-pillar w ork for

th ick seams ............................................*692— D raw slate does not p roh ib it m echanical

loading ..................................................... 768— Driving room s up pitch, Danger i n . . . . 700— Loading coal by trip s in ro o m s.............. 184— Loading m achinę, Developing błock of

room s w ith ..............................................*681— Panel system localizes explosions, 687;

Mine plan ................................................ *688— Retreating panel in use of coal loaders. .

*691, *693— Slabbing in room w ork .......................... *68*4— Stripping methods, p as t and p re se n t. . *797W orking, M ethods ofW uxtry H ow at a t w o rk ................................... 782W renoh, Don’t lengthen y o u r .......................... 958W yoming— B arricade saves lives, F ron tier m ine. . . . *150 — Fording th ro u g h a mine entry in W yom

ing .............................................................. *862— M iners sign 3-yr. co n trac t........................ 467— R atify 3-vr. pact ........................................... 576— Sheridan-W yoming Coal Co.’s tip p le . . . . *929

PageA DAMS, W. W. Old men m ore subject

than younger to accidents................. 941Affelder, W. L. Sparking of m o to rs. . . . 16A lford, N. G. Q uantity tim ber used in soft

coal m ines ............................................*563A llen, A. Tw in-rope skip ho ist w orks

w ell ...........................................................*935Alloway, li. E. Loading coal by trip s in

room s ...................................................... 184A nderson. C. E. Balanced m ines and

rock-bottom costs ........................... *637A rm s, R. W. A ir tab le cleaning, Theory

and practice ..........................................*351-------By tum bling bone is freed from a s h . .*421

A9hley, G. H. Classification of c o a l . . . . *16 7 A twell, C. A. Specially designed m otors

foi* la rry c a r ..........................................*237

■pEDPOW, M. S. E lectrician ncipo senby helping o thers ........................... 149

------- P ays to keep electrical equipm ent inrep a ir ...................................................... 172

Bevan, L. W. Prolonging life of wire ropein m an u fac tu re and u s e ................. *872

B iąuet, M. F reezing process to sink sh a ftsin n o rth Belgium ..........................*831

B?auvett, H. B. D octoring a sick industry . 818 Bohmer. J r . H.. H ints ort pipę gaskets. . . . 183 Bovard, W. F . Company laundries for m in

ing tow ns ...............................................*244B right. G. Spark ing of m o to rs ................... 16Brosky, A. F . Forging and tem pering m a

chinę b its ........................................................ *3--------B etter m ethods in Beech B ottom m ine.*521------- Coal industry aw akened to valuc of

pa in t ..........................................................*901------- Increased tonnage by loading equip-

m ent ............................................... *197,------- Lew is mine uses błock sy s tem ...............*343------- M echanical loading. P rogress i n ............. *67------- Mine m anagem ent should fu rn ish data

fo r design of new tip p le ................ 834------- W et coal du st still coal d u s t ....................*423Brown. R. D. Build every th ing of con

crete. 0 'G a ra .........................................*557B urrow s, J . S. T idew ater coal business

increases ................................................. *79B utterfie ld , G. B. Rock dusting lowers

insurance ra te ..................................... 919

/^A M E R O N , E. B. F lash ing of substation ^ generato r stopped by choke co il..*887Cameron, G. D. P ro tective ap p ara tu s for

substa tion ...............................................*701C arpenter, W. M. Gas proves to be an

active riv a l of a n th ra c ite .............. 766Chadbourne, B. W. Selecting m otor for

driv ing fan ............................................ *722Chance, H. M. H igh grade m ateria ł in

poor coal ...............................................*633Coates, H . W. Cincinnati m a rk e t ................. *9óConnelly, P . T . Econom ical w ay to cu t

slots in spray pipę ............................. 702•Cooper, M. D. S park ing of m o to rs ............. 19Cornet, F r P rin^ ip les underly ing h u

m idify ing a ir ........................................ “1.85

AUTHOR’S INDEXPage

Cotć, H. A ttachm en t fo r lub rica ting trolleywheel ........................................................ *148

Cranshaw , J . E. Dynam ite exerts equalforce everyw ay . . . . ' .................................... 23

DABNEY. H. R egula ting flow of a ir atfoot of sh a ft ....................................... *579

Dake, W. M. Modernize coal miningpractice ....................................................*131

------- How to get b ig o u tp u t from loadingm achines ..................................................*689

Davidson, E . W. C aptive m ines on in-crease ....................................................... *73

------- Miners w ant 4-yr. c o n tra c t....................... 213-------Mine yields curious re lic s ........................ *273Dowell. A. B. L in ing sh a ft w ith precast

concrete ................................................... *437Drennan, W. J. Building long retard ing

conveyor .................................................. *'235D rullard, H. R. Deep-hole drilling by

sectional rods .....................................*614gA V E N S O N , H. N. Sparking of m otors. 16

-------O u tpu t per m an varies w ith conditions ........................................................ 204

-------TTse fiber duet if conductors liea t. . . . 254Edw ards, G. Banish open-tlam e l amp. . . . 65(1 E llis, W. P . Coal fre ig h t-ra te decisions. . *8j E m erson. G. H. Keeping mine locom otires

fit ..............................................................*618

FORSYTHE, E. M. T esting fo r electrlccharge ..................................................... 383

ę^E A L Y , E . J . E ngineering progress. . 77

------- Cost cutting- suggestions ...........................*678Geddes, M. D. A lberta seeks to fili the

coal b ins of C anada ........................ *867Geismer, H. S. U nited Mine W orkers and

Reds ........................................................ 151Gerke. A. New coal-cutter drives gang-

ways ....................................................... *240German, W. T. Dry b a tte ry a menace in

b lasting ................................................. 184------- P roper a ir spaces in charging h o le s ..* 2 5 5G ottschalk . C. Give loading m achinę

chance it deserves ...........................*681G raham , J . I. Oxidation of pyrite or coal

cause m ine fire ............................. .. 509Gray, J . L ots shou ld be draw n fo r w ork

ing places ............................................ 650Grimes, R. L. W here electric power can

be saved ............................................... 472Green, D. V isual aids to car m anagem ent.*183

J_JA LL, R. D. T ribu te to notable ed ito r.* 1 3 6

------- S outh W ales coal seam s folded likeP enn ......................................................... 466

H arring ton , D. D ust h a rm fu l to h e a l th . . 417 Hebley, H. F . Tw in-rope skip h o ist w orks

well .........................................................*935H erzog , H. O. G erm an coal in d u stry and

R u h r b lockade ...................................*107

PageHood, O. P . Ash found in com m ercial

an th rac ite ............................................ 272Holm an, W. C. M inim izing and localizing

mine explosions ................................*627Holmes, G. E arly coal s tripp ing fuli of

h eart-b reak .............................*797, *835H orlick Jr., J . H. Using rock dust in

shotholes to lessen violence andinerease lum p coal ........................... 805

Hoskins, A. J. Pow er in m ine used orw asted ................................................... 498

------- Illinois m ines generate own electricity .*631-------W hat to avoid when sto ring soft coal.*840

TLSLEY , L. C. M aking A pplication of-L electricity safe ................................ *569-------S parking of m otors .................................. 16-------Keep open-flame lam p from coal m ines. 680Ingle, D. Coal-loading m achines in Indiana.* 163

J AKOSKY, J . J . Mine rescue communi-cation ................................................... 139

------- Can signals be tran sm itted by groundcanduction ..........................................*529

-------P rogress made in voice transm issionunderground w orkings to su rface .*801

Jam es, H. D. Care and ad justm en t cam-type contro llers ................................*5ou

Johnson, W. McA. R apid gTowth of peat. 293 Jones, A. M iners draw lo ts for w orking

places ............................................ 23Jones, E . E . P reventing stray curren ts

from detonating explosives . . . . *239 Jones, J . E. Shale dusting spreading rapid ly

in Illinois ............................................ *683-------Old Ben Corp., ex tingu ished seven

m ine explosions w ith rock d u s t . . *907

KENDALL, E . E. R elief valves preven tbreakage of pum ps ......................... 581

K enw orthy. O. JE. Renew al of fu ses madesafer ...................................................... *439

------- Checking locom otive w heels beforeusing ...................................................... 472

------- Safety-fuse box successful .................... *545------- Feeder wire hanger fo r m ine serv ice. .*9 2 2K im ball, G. E . M aking pow er-line w ork

easy and safe ....................................... 506K neeland, F . H. W hat an th rac ite region

is doing to inerease sale of fines.*673------- New equipm ent show n a t C incinnati

Convention .............................................*772-------A n ti-fr ic tio n b earings low er tra n s’—

po rta tio n costs ................................... *603K night. E. D. Get com petent engineer and

folio w h is advice ............................ 615K rause, E . Siphon dra wing a ir w orks

continuously .......................................... *150

T AMBIE. R. M. Ben wood explosion show s need of un ifo rm m ininglaw s .........................................................*728

L eaf, C. L . Bell-ringring b a tte ry floats onau tom atic charger ............................. *544

1 2 C O A L A G E Yol. 25

L itch tenberg , Chester. A u tom atic substationeq;iipm ent, O peration and eo n tro l.*1)12

L igh tbu rn , K. W. Safety in robb ing p illai*a n i draw ing lim ber ...................... *'293

Logan, C. L. G iving tro lley bush ings lubri-eatioii and life ..................................

l u t y , B. E. V. P ittsb u rg h m a rk e t............... *94L uxton , J . K. D on’t blam e mine lo r

fa u lts o f w o r k m e n ........................... 544

iv ,| aeW ILLIAM S, J. F. In s tru m en ts th a tdeeide your fo rtu n ę ......................... 761)

-------E xplanation of fan by electrical term s. 53------- T haw frozen w ate r pipes by electricif-y.*438------- Old een trifu g a l pum p n, l*. good as

new ............................... .....................*506M eCarthy, T. F . H andling m ining ma-

chinery .................................................. *307MeKinnęy, W. D. Deseribes loss to Ohio

eoal trade ............................................ 24McDonald, A. V eteran coal mine .................. 18oM cLaurine, H. B. Re stric te d dem and for

com m ercial coal in A labam a. . .*102 McNeil, J . C. Short-lihe ways of handling

coal sales ............................................ *7'MęNeill, R. W. Dynamie b rak ing on slope

hoist ...................................................... *35M oldenke. R. Why Chemical specificatious

oi ca,st iron are undesirabl ■ . . . . 289 M oorm an, C. L. Mine pow er p lan t produces

cheap pow er ....................................... *210M orris, R. W. P assing of 1023 on A tlan

tic seaboard ....................... 03M um ford, A. R. In re s tig a tio n determ ines

best fu rnace fo r bu rn ing smalisiz *s of an th rac ite ......................... *380

M unroe. C. E. T esting force of dynam ite. 23

OTZ, W. B ritish co-operative trade m aking rap id strides . .

coal282N

NE ALE, M. L. L ow ering coal downhillsides w ith m inim um breakage.*715

Owens, H. D eterm ining u nm arketab le coal seam ...............................................*460

1 3 AESKE, F . To get m axim um life uselam p of r ig h t ro lta g e ......................*740

P arker, E. W. Wh at Gov. P in c h o fs phil-an th ropy m eans ..................................*5(56

------- Coal Com m ission’s deductions on an th rac ite ................................................... *403

P au l. J. W. Sparking of m o t o r s ................. 10------- W icks in sa fe ty lam ps ...................................... 46------- Kind of rock dust in m in es .................... 87t>P au li. E. H . How to keep rock drills f i t . .*253 Peterson, C. E. Control of eom bnstion

( I n a ) ................................................................ 22Pow ell, A. R. Byproduct coke fo r domestic

use .................................................................... 30

Pow ell, J . W. Ign ition of gas by sparksfrom fa lling rocks ........................... 203

-------Concreting sh a ft while hoisting con-tinUes ................................................... *611

PrUger, R. Sieeve bearing keeps oil fromsp a tte rin g m otor ...............................*945

D ADEBAUGH, G. H. Best shop practiceI '- in repair work ................................... *279-------How to select and use grinding and

polish ing wneels ................. ..........*739Read, T. T. Old men m ore sub ject th an

younger to accidents ...................... 941Riee, G. S. Kind of rock d u st to be used

in m ines ............................................... 87(7R itson, J. A. S. M eans of safety helps

B ritain fa ta lity ra te ......................*663Roach, G. F . M atch tro lley grooves to

overhead fittings ............................. *701R oberts, J . W here barricade saved liv es..* 1 5 U Rutledge, J. J . Rock dust fo r b arriers from

cem ent p lan ts ..................................... 650Rya.ii, J . T. W hat A m erican m ining may

learn from E uropę ......................... 41-------W orkm an\s share in B rita in .................. 5*1------- W hat rock d u st costs and how m uch

is needed ............................................... 700

OAYERS, R. R. Kind of rock d u st to be^ used in m in?s .................... .......... 870Sehaffer, W. Diesel oil-burning engine in

coal m ining ....................................... 330Schloss, C. M. Steeply p itching coal tapped

by slope in underlying s h a le . . .* 4 5 1 Schultz, G. A. W ants are due to erosion. . 151 Sm ith, J . H. Why sho ts explode prem a-

tu re ly ................................................... 292Snelling, W. O. E xperim ents w ith dynam ite. 23 Snider, G. N. R ates set fo r tidew ater coal. 650 S tahl, C. R. L im ita tions of Beekley coal

bc*d and how to offset th e m ..........*485Stroup, T. A. U tah com pany uses top

cu ttin g successfully ........................ *599Sutor, D. M. Coal strip p er uses new

m ethod ....................................................*415

npA Y LO R, N. S. P ro tec tin g m otor gen-1 era to rs and ro ta ry converters. . . 545

Thom pson. C. H. Advice to users ofm echanical loaders ...........................*699

T ruan t. V. Coke s itu a tio n ;n F ra n c e .......... 10TiTiipholme. C. H. S. To minim izc break-

dow.is of electrical m achinery . . . 5------- B ritish trade u ase ttled at year’s e n d . . * 1 0 4------- New furnace solves problem s of b u rn

ing an th rac ite dust ........................ *17;>-------W asher at B ritish colliery tre a ts mixed

coals ...................................................... *455T urner, J . H. L ethbridge coal field devel-

oping rapid ly .....................................*459

PageV ° N

■>oo

P ag eBERNEW1TZ, M. W. Kcep open- •

ilam e lam p from coal m i n e s . . . . 680

\1 7 A D E , E. S. W aste stops leak in pum pVV l in e ............................................................

W agner, E. B. M otor-generator sets in twoeubstations ..........................................*59.r»

W alsh, J. J. S park ing of m o t o r s .................. 10-------V entila te fire area w ith in e rt g a s . . . . 55W hite. C. P ecu liar m ine n a m e s ................. 650W illiam s, G. C. T axes reduc^d in propor-

tion to earn ings ................................ 310W illiam s, H. S outh W ales coal prineipal

com petitor of A m erica ....................*720W illiam s, J . Spark ing of m otors ................ 10W illiamson, H. A. New record for prcduc-

tion in No. W. V a.............................. 101Wing, D. L. Relation of cost of production

to price of coal ................................ 428W olkins, G. G. New England bitum inous

trade ...................................................... *90W ooton, P. B ritish coal exchanges............ 15-------W age reduction and strik e s i t ua t i on . . 19-------R evolutionary era in coal industry . . 47-------Dept. of Mines legislative b ill ............ 51-------Lewis to sponsor eoal-m ediation p lan . 147------- Borah introduces Pinc-hot b i l l ............... 181-------Teapot Dome developm ents....................... 219-------P ro tec tion against gob f ire s .................... 291-------Stabilization in 3-yr. c o n tra c t............. 329-------Official a ttitu d e on trad e s ta tis tic s . . . . 360-------L egality of trade sta tis tics a v ita l issue. 399------- In terconnection ol' power, Rapid

grow!th ................................................. 435-------Conversion of coal consum ers to

storage idea ....................................... 469-------Sen. Oddie prepares coal m easure. . . . 537-------Coal tran sp o rta tio n in foresrround a t

Capitol ................................................. 641m arketing relief from

-C o-operative m arketing relief fromcu t-th ro a t com petition .................

-R etrenchm en t policy m enace to co-operative effort ............................. ..

-Coal fac to r in rep a ra tio n se ttlem en t.-----New N a t’l. Coal Assn. president well

know n to official W ash ing ton . . . . 781-----U nusual situ a tio n in coal trade due

to H oover’s Buy now ” sehem e. 812-----V arying estim ates of coal stocks re-

veal need of accu ra te consum ptiond a ta ......................................................... 849

-----T ransfe r Min. Resources Div. to Cen-sus B ureau m eets opposition . . . . 885

-----Rep. p la tfo rm adopted a t CIevelandh as b road bearing on coalin d u stry ............................................... 916

-----R eorganization of s ta tis tica l b u reausdifficult ................................................. 952

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