Anthony, Gardner Chace, 1856- [from old catalog], Ashley, George Francis, [from old catalog] joint author · Boston, D. C. Heath & co. · leaf 132
Fig. 186. … Fig,. 187. 116 DESCRIPTIVE GEOMETRY 150. Through a given point on a directrix, todraw an element of the hyperbolic paraboloid. Principle. The required element must liein a plane containing the given point and par-allel to the plane director. A second point inthis line will lie at the intersection…
Geometry, Descriptive
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