Crawshaw, Fred D. (Fred Duane), b. 1874, Phillips, J. D. (James David), 1869- joint author · Chicago, New York, Scott, Foresman and company · leaf 220
o an enlarged scale. PREPARATORY INSTRUCTIONS FOR DRAWING PLATE 31 The true length of the edge of a pyramid cut at a slant isfound as previously described. Finding the true length of theedges from the vertex to the point where the edge strikes the cutinvolves the same theory discussed in connection…
Mechanical drawing
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