Page:Notes for mechanical drawing; arranged for the use of the students of the Mechanic arts high school and the Evening school of trades (IA notesformechanic00math).pdf/9

 MECHANICAL DRAWING ''MARGINS:-Tack the paper on the drawing board, and draw marginal lines as shown in the drawing below, obtaining a working space of 9” × 12”. Use the T square for all horizontal lines, and the triangles in connection with the T square, for all vertical lines, and lines at 15°, 30°, 45°, 60°, and 75°.''