Page:An introduction to linear drawing.djvu/80

 ﻿to connect the two points where these two lines inter- sect the vanishing lines, and the square is finished.

To draw the perspective of a second square, place one foot of the dividers at those angles of the first square which touch the base line ; draw the dotted quadrants or quarter circles ; and, from the points where they strike the base line, draw oblique lines to the points of distance on each side of the vanishing point, and the four points where they intersect the vanishing lines will be the four corners of the next perspective square; and you have only to connect these points by lines parallel to the base line. Pursue the same course in drawing the third square, and so on.

PIG. 6. PLATE II.

To draw the perspective of a solid body as a Cube or Prism. First, by directions under fig. 5, draw the perspective base, then raise perpendiculars to the base line, and by uniting their tops form that face of the cube or prism which is parallel to the Perspective Plane, and is the nearest face to the spectator's eye or point of sight. From the four corners of this face of the cube draw lines to the vanishing point, following the direc- tion of the right and left sides of the perspective base. Raisfc perpendiculars from the two distant points of the base until they touch the two upper vanishing lines, and connect these two points by a right line, and the per- spective cube is formed.

To draw a second Cube, draw a second base as in fig. 5, raise perpendiculars, and proceed as with the first cube.

In the directions for drawing a Cone (Part 1, Class 4) it was remarked that although the base was an exact circle, the laws of perspective required that it should be represented as an ellipsis or oval. The mode of representing a square in perspective has been shown ;