Ames, William L. (William Lewis), 1855-, Wischmeyer, Carl · New York, McGraw-Hill book company, inc.; [etc., etc.] · leaf 109
the plane of thelower base. Hence the surface is a doubly generated one, being made up of two sets ofelements. It is the only sur-face of revolution which isdoubly generated. Anypoint on the surface will lieon two straight line ele-ments which are, however,not of the same set. Thesetwo elements… … Fig. 183. iff ///////////. Exercises 376. Show the projections of an hyperboloid of revolution havingthe radius of the gorge circle 1 in. and the elements inclined at 30° tothe planes of the bases, which are 2 in. apart. Show also the lines ofintersection by planes parallel to V andat distances of…
Geometry, Descriptive
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