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 298
z-\rd2 and a3x-\-b3y-\-c3z-\-d3,showing that these are represented by 02D2 and 03D3 respectively. INSTRUMENTS OF CALCULATION 269 If now x, y, and z be successively or simultaneously varied so that D1;D2) D3 coincide with 0„ 02, 03 respectively, the values which x, y, z thenhave will be the solution… … HHscherZch. Instrument lor plotting points by their rectangular co-ordinates. Mayalso be employed for the construction of curves with given ordinates. (2) The Payne-Coradi Parabolograph. Exhibited by G. Coradi, Zurich.
