Geometrical drawing, projection drawing, freehand and ornamental drawing, wash work and brush drawing, elementary perspective drawing, architectural drawing (1921)
International Correspondence Schools · Scranton, PA : International Textbook Co. · leaf 349
I L T S.m -22 … §5 ELEMENTARY PERSPECTIVE DRAWING 63 sides, the surfaces of their roofs, etc. all represent rect-angular surfaces in different positions and at differentinclinations. Any square can be drawn in a similar position, and whenonce projected in perspective it is a simple matter to convertthe square into…