Crawshaw, Fred D. (Fred Duane), b. 1874, Phillips, J. D. (James David), 1869- joint author · Chicago, New York, Scott, Foresman and company · leaf 162
rspective sketch, Fig. 163.Bequired: 1. To make an orthographic sketch of the object shown inFig. 163. 2, To make a pencil mechanical drawing from the ortho-graphic sketch. Given: A perspective sketch, Fig. 164. PENCIL MECHANICAL DRAWING 157 Required: 1. To make an orthographic sketch of the object… … Fig. 163. Keyed Mortise and Tenon 2. To make a pencil mechanical drawing from the ortho-graphic sketch. 158 MECHANICAL DRAWING
Mechanical drawing
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