Walker, William, b. 1821 · New York : C. Scribner · leaf 77
e shadow is darkest,as at a in Fio^. 33, where the shadow at a a is darkest atthe bottom. 70. Shadows are ordinarily darker than shades, espe-cially in sunlight and under a clear sky, and for this reason : 48 On Llglit and Sliad^ —Light i^asses through 7_;?rre air invisibly ; * but if there… … Fig. S3. 71. When, however, the light is not bright, and thereare clouds breaking up and scattering the rays they havenot absorbed, the shaded parts of objects will be dull, andthe shadow from them undefined. * This may be readily shown thus :—In a room totally dark, borea small hole in the…
Drawing -- Study and teaching
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