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 197
it. In principle the calculator is an ordinary slide rule with scales modifiedto suit the special formula. The instrument commands all the accuracycalled for in practice. (7) A Patent Accessory to the Slide Rule. By R. F. Muirhead, D.Sc (Extract from Provisional Specification.) It consists in a… … :h.-„ ■*., No. 0 No. i Nc.Z No. 3 Fig. 8.—Plan of Top of Rule showing Cursors. marks for 1 and for any number N on the slide-rule scale be divided into n equal parts, the end of the m part gives N«, i.e. vN on the slide-rulescale. The apparatus consists of a series of cursors which are movable…
