St. Mark's rest : the history of Venice written for the help of the few travellers who still care for her monuments (1885)
Ruskin, John, 1819-1900 · New York : Lovell · leaf 358
(Fig. 15.) be given in position andmagnitude. It is required to find its dividing-points.Find the vanishing-point v of the line a b. Gl VEN LINE IN HORIZONTAL PLANE. 29 With centre v and distance v t, describe circle cutting thesight-Hne in m and n. Then m and n are the dividing-points required. In… … PKOBLEM V. TO DRAW A HORIZONTAL LINE, GIVEN IN POSITION AND MAGNITUDE,BY MEANS OF ITS SIGHT-MAGNITUDE AND DIVIDING-POINTS- Let a b (Fig. 16.) be the given line. Find the position of the point a in a. Find the vanishing-point v, and most convenient dividing-point, M, of the line a b. Join a V.…
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