HANDBOOK OF MATEEMATICAL TABLES AND FORMULAS. Rkhard Stevens Burington. Ph.D., Dept. of Mathematics, Case School of Applied Sdence. Handbook Publishers, Inc., San- dusky, Ohio, 1933. iv + 251 pp. 57 Figs. 13.5 X 19.5 cm. $2.00. Special price to students and teachers-$1.25. Burington's handbook aims "to meet the needs of students in

mathematics and other subjects requiring mathematical com- putations" . . . and "to supply the mathematical requirements of the workers in other fields of science, such as chemistry, physics, and engineering." The detail with which the mathematical formulas and the explanations of the tables are presented should assure the fulfilment of this aim. The material in part one may serve as an outline for a general review of the elementary branches of mathematic;, including vector analysis. From a chemist's standpoint, however, there is little useful information in this handbook that is not already available in chemical handbooks.

TBB UNIVBPISIN OR WISCONSIN MADISON. W~SCONSIN

PAUL C. CROSS

Tmm-RIVE YEARS oa CHE~CAL ENGINEERING PROGRESS. Silver Anniversary Volume of American Institute of Chemi- cal Engineers. Edited by Sidney D. Kirkpetrick. Published for the Institute by D. VanNostrand Co., Inc., New York City. 1933. ix + 387 pp. 15 X 23 em. $4.00. For sale through Office of the Executive Secretary, Bellevue Court Bldg., Philadelphia, Pa. Twenty-five years of chemical engineering achievement in

America in virtually all branches of the industry is summarized in the twenty-five essays by recognized authorities comprising this volume, published by the American Institute of Chemical Engineers on the occasion of the Silver Anniversary of its fonnd- ing-in 1908. Individually each essay reviews the progress made during the last quarter centruy in a definite industrial field. Col- lectivelv thev ~ o r t r a v the stirrine eoic of the birth and erowth of . .. " . - chcrniwl engineering in Amcrica and the events that in 3. mere twenty-five yean have transfclrmrd it from a formlcss conglorner- ate of chemistry and engineering into the crystalline structure of a new profession, recognized today as a definite branch of engi- neering.

Fortunate, indeed, i t is that most of the men who have shaped the destiny of chemical engineering are still in active service and haw contributed in this volume from a wealth of professional experience that covers the entire period under discussion. A r t h e D. Little, the dean of American chemical engineers, traces the history of research and touches on the most significant develop- ments in this line and their implications to manufacturer, hanker. and the general public. E. R. Weidlein, Director of Mellon In- stitute of Industrial Research, in collaboration with L. W. Bass, presents a statistical survey of the economics of the chemical industries for the period 1909-31, showing, among other things. the number of establishments. waee earners. and salaried em~lov- . .. . . ccs in the dinerent brnnclws of the indurtry, togctl1r.r with data un wages, salaries, cost of materials, vnluc of output, and manu- facturing pruilts. hlnnufacturing indercp of diffcrmt industrirs, fuel and power consumption, exports and imports, and financial aspects, too, are set forth in tabular form witb explanatory notes.

Other contributors discuss specific rather than general fea- tures of certain chemical industries. For example, JV. S. Landis, of American Cyanamid Co., discusses advances in the electro- chemical industries; F. C. Frary, of Aluminum Company of America, writes on electrometallurgical progress with special emphasis on the ferroalloys; and A. T. Weith and A. V. H. Mow, both of Bakelite Corp., review plastics as an old industry recently revitalized by modern chemical technic. George Oenslager, of B. F. Goodrich Co., this year's Perkin Medallist, reviews the chemical and engineering advances in the rubber industry, espe- cially in connection with accelerators; H. W. Sheldon, Socony- Vacuum Corp., traces cracking developments in petroleum re- W g ; and C. 0 . Brown, of the Chemical Engineering Corp., dis- cusses chemical engineering's most brilliant recent development, high-pressure synthesis, with special reference to hydrogenation of petroleum, the making of synthetic ammonia, and methanol, the design-of equipment and the selection of catalysts.

Twenty other no less distinguished chemical engineers write on a quarter century's trends in their particular fields which range all the way from chemical engineering education to water, sewage, and trade waste treatment and from acids and heavy chemicals to sugar, paper, glass, and paint making. As a broad and fascinating portrayal of the whole development of chemical engineering in America in its myriad forms, this volume has a place in the library of every chemical engineer, in the plant and laboratory reference room, and in the schools and colleges where the embryo chemical engineer first envisions the career that lies ahead in his elected profession.

MISCELLANEOUS PUBLICATIONS "DECAEMA" T~TIGKEITSBERICHT, 1932. Dechema, Seelze near

Hanover, Germany. 1933. 7 pp. 21 X 29.5 em. Gratis. The R~@ort o j the "Decheme," German Association qf Makers of

Chemicol Apparatus for the Yew 1932 has just appeared. The pamphlet gives in concise form a review of the program of work of the "Achema," which, notwithstanding the ever-increasing de- pression in trade circles which prevailed until about October, 1932, has been successfully carried out in full. Details are given in the "Report" on the progress which has been made in technical science, the work of the committees which deal with important questions in connection with chemical apparatus and plant (6. g., Standardization), the granting of financial support for the investigation of problems relating to technical and scientific questions, and the "Achema" Chemical Engineering Exhibition which will take place in Cologne. May 1&27, 1934.

Indexes of the "Norm" lealets on Standardization of Chemi- cal Apparatus and Plant of the "Dechema," which have appeared up to the present, and of the "Norm" leaflets now in preparation are also ~uhlished in the oamohlet.

This report may he hah &tis until the supply is exhausted, from the Management Offices of the "Dechema," Seelze near Hanover.

THE PRACTICE OF SPECTRUM ANALYSIS WITH HILGER INSTRU- MENTS. Sixth edition. Adam Hilger, Ltd., 98 Kings Road, London, N.W.I., England, 1933. 58 pp. 15.5 X 24.5 cm. 3s.6d. net. The steady demand for this practical treatise on spectrum

analysis has necessitated the production of a further edition, and the opportunity offered has been employed to effect a very thor- ough revision of the work. While the chapter headings remain practically unchanged the chapters themselves have been over- hauled and matter which has passed its period of usefulness re- jected. This has enabled a considerable bulk of new material to be included without increasing to any marked extent the size of the hook.

. . The main alterations are to be found in the chapter dealing

with quantitative spectrum analysis, and the recent advances in this part of the field are covered in detail. The use of the Logarithmic wedge sector is discussed at length and the work done by its means is reviewed. The use of the microphotometer comes in for examination, while other aspects of the subject to which attention is devoted are the new ratio quantitative system, and the possible attainment of higher accuracy in quantitative analy- sis.

In other sections the discussion of, for example, the photo- graphic plate and its characteristics has heen extended, while entirely new material appears in the farm of notes on the effect of polarity in the arc, on the preliminary treatment of specimens. etc. Throughout, the endeavor has been made to render the book as useful as possible to the man who uses the spectrograph.

BIBLIOGRAPHY OP SCHOOL BUILDINGS, GROUNDS, AND EQUIP- MENT. Parts I1 and 111. Henry Lester Smith and Forest Ruby Noffsinger. Bureau of Cooperative Research, School of Education, Indiana University, Bloomington, Indiana, June, 1933. Part 11, 182 pp.; Part 111, 130 pp. 15 X 22.5 cm. $0.50 per volume. A limited number of copies of the bulletins will be distributed free of charge.