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 62
e tracing-point is carried around the area to be meas-ured, while the other end of the tracing-arm is guided back andforth along some line. The guide-line is usually either a straightline or an arc of a circle. When the tracing-point has returnedto its initial position the net angle turned through…
Building materials · Machinery
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