Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 245
228 MECHANICS. 7/ V///////// … \ / If MACHINE DESIGN AND MECHANICALCONSTRUCTIONS. In the designing of new machines and mechanical constructions, the draughtsmanmust draw from his knowledge of well-known forms and parts, and combine them; but,to proportion them properly, and adapt them to the purposes required, he must…
Mechanical drawing
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