Kenison, Ervin, Bradley, Harry Cyrus, 1871-1936 · New York : The Macmillan Company · leaf 201
Fig. 261. Fig. 262. Fig. 263. Cone in the first quadrant; base in H; baseinvisible. Fig. 264. Cone in the third quadrant; base in V; basevisible. … Fig. 263. Fig. 264. Fig. 265. Cone of revolution; base a circle in the P-plane.While these are the projections resulting from projecting XIX, § 160] TANGENT PLANES 181
Geometry, Descriptive
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