Young, George, jr, Baxter, Hubert Eugene, joint author · New York, Macmillan · leaf 87
FiQ. 66 shown in Fig. 65. When a profile plane of projection is usedthere will be a third trace, which intersects the other traces,one on each of the profile axes. (See Figs. 66 and 67.) The … Fio. 67 profile trace is little used, however. Hereafter, unless otherwisespecially noted, the phrase traces of a plane will be taken tomean the traces on the H and V planes. VI, § 59] POINTS, LINES, AND PLANES 69
Geometry, Descriptive
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