Kenison, Ervin, Bradley, Harry Cyrus, 1871-1936 · New York : The Macmillan Company · leaf 34
Fig. 20. side of the 77-projection, but on the farther side of the F-pro-jection. The principal use of this quadrant is in the subjectof perspective. Third Quadrant (Fig. 21). The point lies beyond theplane of the drawing in each projection, and must be imagined II, § 20] POINTS AND SIMPLE SOLIDS… … id*+d Fig. 21. Fourth Quadrant (Fig. 22).second quadrant, withH and V reversed.It is little used inpractice. 20. Views of aPrism. The plan andelevation of a hex-agonal right prismplaced in the thirdquadrant are given inPig. 23. The prismis in a vertical position, its upper base in the if-plane.…
Geometry, Descriptive
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