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 45
Fig. 25 area of the square; that is to say, the shadow is projected as a square standing on one corner, whose sides are tothose of the original square in the ratio of J V2 to 1, and whose diagonal is equal to the sides of the originalsquare, as in the figure. The true shape of the Shadow is shown…
Shades and shadows
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