Lynde, Carleton John, b. 1872, Gilbert, Alfred C. (Alfred Carlton), 1884-1961 · New Haven, Conn. : A.C. Gilbert Co. · leaf 123
120 GILBERT BOY ENGINEERING A, a … 4 inches long; put thetube into a hole inone side of the boxand paint the oppositeside of the box black.Place an electric lightor oil lamp on each Fig. 183. A cameraFrom Lyndes Physics of the Household, publishedby The Macmillan Co. side of the postcard and close to it, and arrange two shadesto…
Light · Scientific recreations
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