Shop sketching, a course of problems for mechanical drawing students (1919)
Windoes, Ralph Flagg, 1890- · Milwaukee, Wis., The Bruce publishing company · leaf 29
nsions, which will bemeasured on the object with the rule. The Perspective Protractor Our previous examples have all been in 45 de- vertical touching the horizon at the level of the eye. gree perspective, that is, the angles of inclination of It is apparent that if the object is of irregular… … Figure 9 PROBLEMS IN SKETCHING 27 drawing. Hence we will construct a protractor thatwill be of help in solving problems involving irregu-lar dimensions.
Mechanical drawing
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