Lynde, Carleton John, b. 1872, Gilbert, Alfred C. (Alfred Carlton), 1884-1961 · New Haven, Conn. : A.C. Gilbert Co. · leaf 67
64 GILBERT BOY ENGINEERING … Fig. 96. You become a marvelous acrobatFrom Magical Experiments, published by David McKay Co., Philadelphia FUN WITH THE CURVED MIRROR Experiment No. 54. Converging sunlight. Open the slit inyour darkened room to its full size and allow the sunlight tofall on the concave (curved-in) side of your…
Light · Scientific recreations
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