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 225
Fig 196 SECTION G If OB be equal to b, the general formula gives S = ;z/, or S=nl-\-2Tral-\-7rl2-{-Trb2, according as the circle is entirely outside or entirely inside the area S. If very accurate results are required, account must be taken of severalsources of error. One of these errors is that… … Fig. 5. pensation Planimeters have been constructed, in which attempts have beenmade to eliminate this error. The method for eliminating the error wasgiven by Lang.1 In fig. 5, if the axis of the integrating wheel make a smallangle e with AB, the part of the reading recorded by the integrating…
