Experimental engineering and manual for testing. For engineers and for students in engineering laboratories (1906)
Carpenter, Rolla C. (Rolla Clinton), 1852-1919 · New York, J. Wiley & Sons; [etc., etc.] · leaf 74
-] APPARATUS. 4$ edge of a triangular scale which is supported in an ingenious man-ner, as shown in the accompanying figure. The planimeter-anrican be adjusted as in the Amsler Planimeter so as to read theM. E. P. direct. An adjustable pin, E, is employed for thepurpose of setting off the length of… … Fig. 14a.—The Willis Planimeter. circumference of the wheel. The only conditions of accuracy-are, that the axis of the scale shall be at right angles to thearm of the planimeter, and that its graduations shall beequal to the area to be measured divided by the length of trie-arm. 34. The…
Building materials · Machinery
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