Lynde, Carleton John, b. 1872, Gilbert, Alfred C. (Alfred Carlton), 1884-1961 · New Haven, Conn. : A.C. Gilbert Co. · leaf 43
light 2 is placed so thatit will throw light on a personseated opposite Bl, B2, or B3, tbut not on the glass. Whenlight 1 is up, a boy seated oppo-site Al, A2, or A3 will be seenby the audience by reflectedlight as seated at Bl, B2, or B3.When light 2 is up. a boy seatedat Bl, B2, or B3 will be… … WINDOW GLASS Fig. 68. Transformations GILBERT LIGHT EXPERIMENTS 41
Light · Scientific recreations
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