When a pupil draws a house like A, in Fig. 12, explain wherein the drawing is incorrect, as shown in B, after having
made a drawing, showing the manner of finding the proper vanishing point and horizon line. If the point of station, etc., seem too complicated to the pupil, simply explain that the lines of the sides of the building recede as shown in B.
Explain to the pupil that when drawing the houses in Fig. 15 it is easier than in Fig. 12 to establish the point of sight and vanishing point, because they are the same. The lines in the houses that recede from the beholder converge to those points. The side of the houses, as at C, being parallel to the horizon line, have no vanishing point.

Mistakes in Perspective Corrected. In Fig. 12 is represented a crude drawing of a house made by a boy who lacked knowledge of perspective. In B the dark and dotted lines show how the house should have been drawn, the light lines being those of the original and the dashed lines those of perspective. Fig. 13 shows how the correct drawing was made.
The same boy drew the four houses shown in Fig. 14. In Fig. 15 the houses are drawn according to the simple rules of perspective shown in this chapter.


Four Important Points in Perspective. First, the point of sight; second, the horizon line; third, the vanishing point; fourth, the point of station.
The Point of Sight is that spot which the spectator sees when he looks straight before him.
The Horizon Line is a line parallel with the top and bottom of the picture drawn through the point of sight. The