The Elements of Perspective / arranged for the use of schools and intended to be read in connection with the first three books of Euclid

by John Ruskin

TO FIND THE VANISHING-POINT OF A GIVEN HORIZONTAL LINE.

Fig. 9.

Let A B, [Fig. 9.], be the given line.

From T, the station-point, draw T V parallel to A B, cutting the sight-line in V.

V is the Vanishing-point required.[Footnote 14] ]

[p18]
][COROLLARY I.]

As, if the point

b

is first found, V may be determined by it, so, if the point V is first found,