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 229
Soc. Mech. Eng. 3 Zeitschrift fur Instrumentenkunde, xxv. 261-273, I9°5- 4 Engineering, Ixxiv. 740, 742—743, 1902. 5 Greenhill, Engineer, lxxxviii. 614-615, 1899. 6 B.A. Report, 1894. 200 SECTION G Further information as to details of construction, etc., is given in DycksCatalogue, Morins Les… … Fig. S.—Earliest form of the Rolling Planimeter. This was constructed in 1883. Rolling-Sphere Planimeter
