Kenison, Ervin, Bradley, Harry Cyrus, 1871-1936 · New York : The Macmillan Company · leaf 204
represent two points.But let kv be assumed in theoutside or contour element L.Then kv is the projection ofbut one point in the surface. A similar construction for thecylinder is shown in Fig. 272,the assumed projections beingthe double point arbv, and thesingle point kv. In Fig. 273, the assumed… … Fig. 272.
Geometry, Descriptive
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