Young, George, jr, Baxter, Hubert Eugene, joint author · New York, Macmillan · leaf 194
allel toX, the H trace of which is tangent to the base of the cylinderas Y or Z, will contain an element and will be parallel to ab. If the given surface is a cone, a guiding line passed throughthe apex and parallel to the given line may be used. Thetraces of this line give one point on each of the… … 176 DESCRIPTIVE GEOMETRY [VIII, § 155 If the inclination of the given line is equal to that of the cone/there is but one tangent plane. If the inclination of the lineis greater than that of the cone, the construction is impossible. 156. To Pass a Line Tangent to a 0one or a flylinder. Fol-lowing…
Geometry, Descriptive
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