Applied perspective, for architects and painters (1901)
Longfellow, William Pitt Preble, 1836-1913 · Boston and New York, Houghton, Mifflin and company · leaf 113
re divided proportionally, and ab, mn, and cd meet inone point. The following method, already used in Fig. 50, is often more convenient when thereare several lines to be drawn to the same inaccessible point V, whose distance from agiven point C, say the Centre, is known. If we wish to draw aline to… … PERSPECTIVE HELPS 61 Then, joining a and C, we set off on that,from C, Ca equal to one third of Ca. Wejoin a V/3, and a V must be parallel to it, forthe triangles a VC and a V/3C must be simi-lar triangles. Suppose again that we wish to constructany figure, a square for instance, on a lineab whose…
Perspective
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