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History from below Mathematics, instruments and archaeology Stephen Johnston Museum of the History of Science University of Oxford. Astrolabe by Erasmus Habermel, Prague, 1590s?. Inch scale, with numerals from 1 to 9 (almost) decipherable. - PowerPoint PPT Presentation
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History from below
Mathematics, instruments and archaeology
Stephen Johnston
Museum of the History of ScienceUniversity of Oxford
Astrolabe by Erasmus Habermel, Prague, 1590s?
Inch scale, with numerals from 1 to 9 (almost) decipherable
Timber with a square cross-section (b = c), and for which the volume is to be determined
Leonard Digges, Tectonicon (London, 1556)
Leonard Digges, Tectonicon
Folding rule by Humphrey Cole, London, 1574
Leonard Digges, Tectonicon
Longport House carpenter’s rule, 1635
How to reckon up solid timber when b does not equal c?
Longport rule Square root table
Product 4 x 15 5 x 12 6 x 10Root 7,14 7,15 7,15
Product 5 x 16 8 x 10Root 8,18 8,19
Product 6 x 16 8 x 12Root 9,16 9,15
Square roots expressed in inches and twentieths
La Natiere wreck, St Malo
Samuel Sturmy, The mariners magazine, or, Sturmy's mathematical and practical arts (1669)
La Natiere wreck, St Malo: “1648 IC”
One foot carpenter’s rule
Whipple Museum of the History of Science University of Cambridge
Rule with board scale and timber and board tables, 1648Whipple Museum
