Appleton's dictionary of machines, mechanics, engine-work, and engineering : illustrated with four thousand engravings on wood ; in two volumes (1873)
D. Appleton and Company · New York : D. Appleton and Co. · leaf 470
6ti … Fig. 3020 is another plan of a parallel motion sometimes used: the method of finding the length of(he rod D c and position of the point U is the very same as that described in Fig. 3019, viz., by puttingthe beam in its three positions, and marking the places of the points ccc of the strap, while…
Mechanical engineering · Mechanics · Engineering
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