Ames, William L. (William Lewis), 1855-, Wischmeyer, Carl · New York, McGraw-Hill book company, inc.; [etc., etc.] · leaf 31
nesof projection about an axis in that plane and passing throughthe corresponding trace of the line. Given line A and the axis in H passing through the Htrace, to revolve the line into H (Fig. 23). It is evidentthat the H trace of the line, being the point of intersectionof the line and the axis of… … Fig. 24. Fio. 25. wUl be the line joining the revolved position of the pointwith the H trace of the line. This problem is simplified by letting the axis of revolutioncoincide with the H projection of the line (Fig. 24). Therevolution of the assumed point will then be accomplishedby the method of…
Geometry, Descriptive
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