Practical draughtsmen's work, with numerous engravings and diagrams (1903)
Hasluck, Paul N. (Paul Nooncree), 1854-1931, ed · Philadelphia, D. McKay · leaf 46
he former, and the two free edges give parallel andperpendicular lines as required. The carpenter and joiner maydo this more readily with a stifF-jointed 2-ft. rule, using thedrawing-board and T-square as shown in Fig. 64. DRAWING 8TRAIGET LINES. 43 Tlie testing and adjusting of the drawing-board,… … Fig. 62.—Straightening the Edge of a Set-square. ^ N\\ C • K /. \ 1 1 X Fig. 63.—Drawing Parallel and Perpendicular Lines by Set-squared. Draw upon the paper a firm T, as in Fig. 65, each of the twolines being exactly 2 in. long. Now study it attentively from adistance; at first the vertical stroke…
Mechanical drawing
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