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 231
Fig. 10.—Rolling-Disc Planimeter, with gliding movement of the measuring roller. 202 SECTION G … Fig. ii.—Rolling-Disc Planimeter, with pure sine movement of the measuring roller.
