Walker, William, b. 1821 · New York : C. Scribner · leaf 75
^^>^ Fig. 31 a. between the light and another object, the darkness socaused is called accidental shadow (see ^ 64), Sliadoiodoes not usually reveal so much the shape of the objectcasting it as the shape of the surface on wMcli it f(dls, asmay be seen in Fig. 30, where the straight stick casts an…
Drawing -- Study and teaching
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