Anthony, Gardner Chace, 1856- [from old catalog], Ashley, George Francis, [from old catalog] joint author · Boston, D. C. Heath & co. · leaf 35
18 DESCRIPTIVE GEOMETRY 25. Case 2. When the line is inclined toV and H and is parallel to P. CoNSTEUCTiON. Fig. 5.1:. If the given lineis parallel to P, its vertical and horizontaltraces cannot be determined by the abovemethod, since the projections of the line areperpendicular to the ground line;… … T^ Fig. 54. . Let it be required to determine the verticaland horizontal traces of the line ab. P isassumed at will and is indicated by HP andVP. Determine a^-h^^ the profile projection ofthe line (Art. 21, page 14), by revolving Pabout VP as an axis until it coincides with V. That portion of P…
Geometry, Descriptive
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