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Modern instruments and methods of calculation : a handbook of the Napier Tercentenary Exhibition (1914)

Horsburg, E. M. (Ellice Martin), Napier Tercentenary Exhibition (1914 : Edinburgh, Scotalnd) · London : G. Bell · leaf 196

An illustration from Modern instruments and methods of calculation : a handbook of the Napier Tercentenary Exhibition, 1914, leaf 196
edge for logarithms of numbers on the spiral. A pair of hands aremounted and held together by friction so as to be capable of any radialsettings. This rule is equivalent to a straight rule about 30 feet long, andgives results correct to 4 figures. (6) Exhibit by Dr Rudolph Taussig The Presto… … Fig. 6.

Napier, John, 1550-1617 · Calculators · Mathematical instruments

Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.

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