Shades and shadows, with applications to architectural details, and exercises in drawing them with the brush and pen .. (1912)
Ware, William R. (William Robert), 1832-1915 · Scranton, International Textbook Company · leaf 37
Fig. 6 A … THE SHADOWS OF RIGHT LINES 11. Right Lines.—The Invisible Shadow of a right lineis an invisible plane of shadow, one element of which is theline itself, which serves as a directrix, and the other elementsare the invisible shadows of the successive points in the line,any one of which elements may be…
Shades and shadows
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