Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 726
nd^) di ^hi drawn parallel to the ground line and limited by S c and S a, is theperspective of g h. In a similar manner the perspectives of all other pointsand edges are found. From the drawing of a square in parallel perspective, we deduce rules forthe construction of a scale in perspective. Let D… … o s Fig. 1789. of distance; now draw 1 1 parallel to the ground line G L, again draw from 1the diagonal 1 D, and lay off the parallel 2 2, proceed in the same way withthe diagonal 2 D and the parallel 3 3, and extend the construction as far asmay be necessary. It is evident o S 1 1, 1 1 2 2, 2 2 3…
Mechanical drawing
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