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 228
enables the required area to be gotby measuring the arc BB by means of this scale, and the scale is calibratedso as to give the reading in units of area. Kriloff1 has substituted a sharp-edged wheel for the knife edge, and claims greater accuracy in the resultsobtained. Another instrument which,… … Fig. 7. and the area swept out by the arm is registered on a linear scale, which isperpendicular to the arm. Miscellaneous Planimeters Here we include several instruments which have been designed for specialpurposes. Among these may be mentioned the spherical planimeter ofAmsler, capable of…
