Walker, William, b. 1821 · New York : C. Scribner · leaf 81
Fig. 38. … Fig. 39. 81. We see objects by means of the rays of light whichare reflected from tlieni into the eye. On Light and Sliade. 53 82. Objects are light or dark in proportion as theyabsorb many or few rays, and they appear light or darkaccording to the number of rays they reflect into the eye. 83. Few…
Drawing -- Study and teaching
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