Kenison, Ervin, Bradley, Harry Cyrus, 1871-1936 · New York : The Macmillan Company · leaf 62
Fio. 77. A general plane Q is shown in Fig. 77, intersecting H, V,and P, in the traces HQ, VQ, and PQ. It is evident that HQand VQ intersect on HV (the intersection of H and V, orground line), IIQ and PQ intersect on IIP, and VQ and PQ … Fig. 78. intersect on VP. Whence, if HQ and VQ are given, PQ maybe found as shown in Fig. 78. 42 DESCRIPTIVE GEOMETRY [VI, § 60 The profile trace of a different plane, R, is found in Fig 79.
Geometry, Descriptive
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