B chapter.indd - Charles Babbage Institute - University of Minnesota

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120 Publisher: Bachelier Edition: 3rd Language: French Figures: 1 engraved folding plate Binding: contemporary leather; black leather label Pagination: pp. xviii, 156, 6 Collation: 1–15 6 Size: 136x81 mm There are two works bound into this volume. The first, by Baudusson, is a trigonometric table based on the metric division of the circle—a new system that never found acceptance. The second table (from 1834) by M. P. Le Terrier is based on the old 360-degree division. Both men were evidently associated with the great Cadastre table project headed by de Prony. Illustrations available: Title page of Baudusson Title page of Le Terrier Sample page from Baudusson Sample page from Le Terrier Erwin Tomash Library Baudusson, M. Bauschinger, Julius Baudusson title, B 113 Le Terrier title, B 113 B 114 Baum, Frank George (1870–) An alternating current calculating device. For the use of electrical engineers. Year: 1902 Place: Stanford, CA Publisher: Author Edition: 1st Language: English Figures: with calculating device and advertising flyer Binding: original paper wrappers; front cover lacking Pagination: pp. 22 Size: 173x130 mm Rather than being a calculating device using alternating current, this is a nomogram with a plastic overlay for performing calculation on data involving alternating currents. Illustrations available: Title page Nomogram (color) B 114 B 115 Bauschinger, Julius (1860–1934) and Johann Theodor Peters (1869–1941) Logarithmisch-trigonometrische Tafeln mit acht dezimalstellen enthaltend die Logarithmen aller Zahlen von 1 bis 200000 und die Logarithmen der trigonometrischen Funktionen für jede Sexagesimalsekunde des Quadranten. Year: 1910–1911 Place: Leipzig Publisher: Wilhelm Engelmann
Erwin Tomash Library Bauschinger, Julius Bauschinger, Julius Edition: 1st Language: German Figures: v.1. 1 photographic plate Binding: three-quarter red leather boards; gilt spine Pagination: 2 vols. v.1. pp. xx, 368; v.2. pp. 952 Collation: v.1. π 10 1–23 8 ; v.2. 1–59 8 60 4 Size: 279x195 mm Reference: Hend BTM, #197.0, p. 153; Zin GBAL, p. 87 At the time of this project, Julius Bauschinger had just left his position as Director of the Astronomical Research Institute in Berlin and had become Director of the Imperial Observatory at Strassburg. An important German astronomer, he appreciated the usefulness of logarithms to all branches of science. Johann Peters, a professor in the Royal Astronomical Calculating Institute in Berlin and an expert on methods of table production, was described by Archibald (see entry for Archibald, Mathematical Table Makers) as perhaps the greatest mathematical table maker of all time. Simultaneously with the start of hand calculation, they asked the engineer Hamann about the possibility of constructing a difference engine to help with the work. The resulting machine is illustrated in the frontispiece, and a description of its workings can be found in the first volume’s preface. These well-regarded tables were some of the first to be completely recalculated—most previously published tables having been based on those produced in the early 1600s by Henry Briggs and Adriaan Vlacq. The Royal Prussian Academy of Sciences and the Imperial Academy of Science of Vienna sponsored the work. The work was published in two volumes—the first, containing logarithms of numbers, in 1910 and the second, logarithms of trigonometric functions, in 1911. The second volume, unlike the first, contains two title Volume two title page, B 115 pages, one in German and one in English. The English title page was added to Volume 2 no doubt in order to capitalize upon the favorable reception of the first volume by extending its distribution to the British and American markets. As can be seen in the illustrations of the tables, the authors used a typographical device similar to that of Bagay to indicate where the most significant digits of the logarithm changed. The mark is a small asterisk in Volume 1 but was changed to a larger one in the second volume. The change was made because the authors felt the smaller mark was not sufficiently visible (see illustrations of Difference calculating machine, B 115 121
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Erwin Tomash Library Babbage, Charl
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B 250 Briggs, Henry (1561-1631) Ari
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B chapter.indd - Charles Babbage Institute - University of Minnesota

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