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 22
placed against the left-hand edge of the board, as shown in Fig. 18. The upper edge C of the blade B is brought very near to the point through which it is desired to pass a line, so that the straightedge C of the blade may be used as a guide for the pen or pencil. It is evident that all lines drawn… … Fig. 18
