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 58
comers of buildings, and thestraight lines which are here sub-stituted for them have the direc-tion of the diagonals of a cube(see paragraphs 22 and 43). Thosewhich occur in the figure areinstances of the second diagonal D^,the shadow of which is a horizontalline twice as long as the edge ofthe… … Ex. IX A
Shades and shadows
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