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 191
Fig. 2. … When the end of the slide bearing two stars is inserted in the side of thebrass end with two stars, and passed along so that the scales alt bx coincide,the instrument is as shown in fig. 1, and the scales are as follows : — (ai), (^i)> (ci)- Gunters line of numbers, doubled; each line…
