Kenison, Ervin, Bradley, Harry Cyrus, 1871-1936 · New York : The Macmillan Company · leaf 302
eady been discussed (§§ 129,131). But planes parallel to H ov Fmay not always cut ad-vantageous sections from the second surface. In such cases, the planes are chosen with respect to thesecond surface, and various devices are adopted to avoid pro-jecting the sections of the sphere as ellipses. Two… … Fiu. 329. 282 DESCRIPTIVE GEOMETRY [XXVI, § 198 Problem 50. To find the intersection of a sphere and a cone. Analysis. Planes passed through the vertex of the cone willcut elements from the cone (§ 190), and circles from the sphere.Let these planes be taken perpendicular to one of the…
Geometry, Descriptive
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