Sullivan, Christine [Gordon]. [from old catalog] · New York, Cincinnati [etc.] American book company · leaf 25
20 ELEMENTS OF MECHANICAL DRA WING. … Fig. 31. LESSON VI. EXERCISE WITH RULER AND COMPASSES. Exercise i. — Describe a circle (Fig. 31). Divide the circumfer-ence into six equal parts. Each chord will be equal in length to theradius of the circle. Divide each sixth into four equal parts. Con-nect each point with every point in the…
Mechanical drawing
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