Higbee, F. G · New York, John Wiley & Sons · leaf 41
itselevation will be on theG. L. at n; and since m ^° ^^ is on the G. L., m — rsince the Hne AB is to be in the plane T — must He on the Vtrace, mn, therefore, is the elevation and mn the plan of MNlying in the plane T. ab and ab are, of course, on mn andmn and are the plan and elevation of a Hne… … PLANES 31 is to assume one view of the point — as the plan view a in Fig.34 — and through this assumed plan view of the point draw theplan mn of a line MN parallel to the H trace. Since this lineMN is parallel to the H trace its elevation will be parallel to the
Geometry, Descriptive
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