Higbee, F. G · New York, John Wiley & Sons · leaf 128
a plane ofprojection, the given right section may be drawn in its givenlocation. If, then, elements be drawn through this section from CONICAL SURFACES 117 the apex the base of the cone in H or V may be found by findingwhere the elements pierce H or V. Construction. In Fig. 94, OQ is the given… … Fig. 94. 9 9 position it is projected at oq^ and oq and P falls at p^ and p.Draw xy equal to the given diameter of the right section per-pendicular to oq; this Hne will be the elevation of the right sec-tion, since OQ is parallel to V, and the ellipse x^y^ will be the planview. Now through x and y…
Geometry, Descriptive
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