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 261
. -t-/;„ sin n— + . . .a a a 1 Elektrotech. Zeit., xxxvi., 1909. For the theory see A. Schreiber, Phys. Zeit.,xi. 354, 1910. 232 SECTION G then .2a i0 = — \ydx, 2a if y cos I ;/ bn=- ysin a J n— \dxa J Like Henricis first instrument, the construction of this instrument isbased on Cliffords… … Fig. 7. PFO, consisting of two arms at right angles to each other. F is fixed to thelower carriage, and thus moves only in the direction of the r-axis. At P isattached a tracer which is made to follow the curve to be analysed, and thedistance of P from F can be varied. 0 can move along a line OK…
