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

c e

is the vertical height of the portion of cone required, or C E.] [Return to text]

[Footnote 25: ] The direction of the side of the square will of course be regulated by convenience.] [Return to text]

[p50]
][PROBLEM XV.]

TO DRAW AN INCLINED LINE, GIVEN IN POSITION AND MAGNITUDE.

We have hitherto been examining the conditions of horizontal and vertical lines only, or of curves inclosed in rectangles.

Fig. 39.

Fig. 40.