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 232
Fig. 13.—Compensating Planimeter Pandero. Needle-pole Compensating Planimeter with short, graduated tracer arm,adjustable within a narrow limit ; as a rule set for the vernier unit -i sq. cm.(By computing figures drawn to a definite scale the area is obtained bymultiplying the reading of the roller… … Fig. 14.—Compensating Planimeter Papetos. Compensating Planimeter with graduated tracer arm, adjustable to itsfull length ; adjustment by vernier ; slow motion for accurate setting toany scale and to allow for shrinkage of paper. 3. Compensating Planimeter Parapet
