Applied perspective, for architects and painters (1901)
Longfellow, William Pitt Preble, 1836-1913 · Boston and New York, Houghton, Mifflin and company · leaf 118
ction is then exceed-ingly simple. Given V and V, the vanish-ing points of the horizontals of the given plane and of the horizontal projection of itsslope lines, and the pitch of the plane — say thevanishing points of the courses in the walls of abuilding and the pitch of its roof— and we may… … y *%. <?J- &/ 7~/^ •./ y ^r ?*c Note. That this construction is true may be proved by comparing the perspective diagram,Fig. 96, with Fig. 94. For, first, the plane ofthe triangle CCS has been taken perpendicu-lar to VV, so that SC and SC, which areequal, are also perpendicular to VV-…
Perspective
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