Young, George, jr, Baxter, Hubert Eugene, joint author · New York, Macmillan · leaf 278
downward,but the solution is the same in principle. Considerable in-genuity is possible in handling this method when the apex ofa cone falls off the paper or on a level with I. If the shadow of the surface is required, it may be east as inI above, or point by point from the shade line, or by a… … 260 DESCRIPTIVE GEOMETRY (XII, § 216 i v Sc-- ^^; H ;i .>: . j f H t 11 1 1 \ 1 1 » 1 \ ; 1 >
Geometry, Descriptive
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