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 130
ereby disturbing those working near. In spite of all these advantages,considerations might be raised against the introduction of a new additionarithmometer, since serviceable multiplication machines have been con-structed x which demand, in general, less crank-turning than this one to forma… … Fig. 40.—(J actual size.) Appearance of the machine. formed without any attention on the part of the user of the machine.The most conspicuous defect of all systems hitherto constructed is therebygot rid of. Fig. 40 shows the external appearance of the machine. The rectangularmetal box, which is so…
