A practical course in mechanical drawing for individual study and shop classes, trade and high schools (1912)
Willard, William Franklin, 1879- · Chicago : Popular mechanics company · leaf 23
20 A PRACTICAL COURSE IN describe an arc making angle 0. Duplicate this anglewith given point as center. Fig. 4. Exercise 4.—Divide two lines into proportional parts.Construction: Lay off one line into any number ofdivisions. Connect the extremities of each line. Bymeans of triangles draw parallels… … Fig. 8 any radius. Construction: With any radius describearc of a circle. From the center of the arc to any pointof the circumference draw^ a radial line. At the ex-tremity of the radial on the circumference erect a 1.This is the required tangent. Fig. 6. Exercise 6.—Duplicate and bisect a given…
Mechanical drawing
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