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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 145

An illustration from Modern instruments and methods of calculation : a handbook of the Napier Tercentenary Exhibition, 1914, leaf 145
ON o c/)u O o 1-1o ■s>CDO X * bO C a, 3 in CD E, so a CD X!H • … CALCULATING MACHINES 121 By means of corresponding mechanisms for inward and outward move-ments these bevel wheels are periodically engaged and disengaged with therecorder, so that the latter is influenced only during the forward displacementof the toothed racks. The ends of the racks rest against…

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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