Page:An introduction to linear drawing.djvu/83

64 ﻿line at K, and you have the other corner of the building.

Draw the diagonals D K and E I, and the point L where they intersect will be the centre of the gable end.

Having measured the actual height of the gable end, continue the perpendicular D E till it reaches M, the actual height. Then draw the line M B. Erect a perpendicular on the centre of the gable end ? and the the point N, where it intersects the line M B, will be the point of the gable end. Then draw the lines N E and N K, and the end is completed.

To draw the Chimney, find its actual height above M, the actual height of the gable end, and continue the perpendicular D E M to O. Draw the line O B, then, oneach side of the centre P L, lay off on the base line two spaces Pa and Pb each equal to half the real breadth of the chimney, and raise the perpendiculars ac and bd.

To find the thickness of the chimney, lead off a line from O to Q equal to its real thickness. Draw the line Q B. Lead a horizontal from c till It strikes the line Q B at e; do the same from g to f; connect e and f by a perpendicular, and the perspective of the chimney is finished.

To draw the other gable end, you must suppose the house to be transparent, and proceed exactly as you did with the first. Then connect the points of the gables, and the line N R will form the ridge of the house.

The door and windows of the side parallel to the perspective plane must be drawn according to their actual dimensions, the rules of perspective only affecting the thickness of their edges.

To draw a house which stands oblique to the picture, that is, one which has no side parallel to the picture or