Rogers' drawing and design; an educational treatise relating to linear drawing; machine design; working drawings; transmission methods; steam, electrical and metal working machines and parts; lathes; boiler and parts; instruments and their use; tables, etc (1913)
Hawkins, N. (Nehemiah), 1833- · New York, T. Audel · leaf 75
Let ACB be the given angle. Fig. 166. With the vertex C as a center, and any radius,describe an arc cutting both sides of the given angleat I and 2. From i and 2 as centers, with anyradius, describe arcs cutting each other at 3. 88 ROGERS DRAWING AND DESIGN. Through this point of intersection draw… … the given angle as described in Problem 2 by theline 3C. Bisect the angles 3CB and 3CA by thelines C4 and C5 and these lines divide the angleinto four equal angles as required. To trisect a right angle ; that is, to divide it intothree equal parts. Let ABC be a right angle, Fig. 168, that is,…
Mechanical drawing · Machine design
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