Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 735
T18 PEBSPECTIYB i DRAWING. pet of the bridge above the spring of the arch. Through the station pointdraw lines parallel to the side a h and end a aoi the bridge, till they intersect … Fig. 1801. the assumed base line M M ; project these intersections to the horizon line ofthe picture for the vanishing points D, D of perspective lines parallel io a hand a a. Let fall a perpendicular from a to a\ and on this perpendicular setoff from a the heights s k, s I, s m, and s r; from a…
Mechanical drawing
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