Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 167
Fig. 301. Fig. fined by lines drawn lightly in India ink, and, to prevent mistakes, erase allpencil marks before proceeding to the operations determining the lines ofshadow. JlITLO … .<i> -^ \ iiiii ^ ^ III III IjK, / ||lj|}Ufl| 1 llB ^ III 1M t/l\r ,T Fig. 303. Fig. 304. In Fig. 303 the three sides of the hexagonal pyramid. A B F, A B C, andA C D, alone receive the light; consequently the edges A F and A D arethe lines of shade. To determine the shadow cast by these two…
Mechanical drawing
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