Shop sketching, a course of problems for mechanical drawing students (1919)
Windoes, Ralph Flagg, 1890- · Milwaukee, Wis., The Bruce publishing company · leaf 30
Figure 9 PROBLEMS IN SKETCHING 27 drawing. Hence we will construct a protractor thatwill be of help in solving problems involving irregu-lar dimensions. … Figiire 10 Figure 10 illustrates the perspective protractor.It is constructed as follows, using the regular draw-ing instruments: On a piece of heavy drawing paper or Bristolboard, draw the vertical and horizontal center lines.With their intersection as center, draw two circles,one 1 in diameter,…
Mechanical drawing
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