Lynde, Carleton John, b. 1872, Gilbert, Alfred C. (Alfred Carlton), 1884-1961 · New Haven, Conn. : A.C. Gilbert Co. · leaf 124
late S. Experiment No. 125.To illustrate the camera. Put your converging lenses in turn ina ring holder, and put the holder in a hole in one end of a card-board box (Fig. 184). Cover the box and your head with a darkcloth and move the screen back and forth until you get a picture. The… … 122 GILBERT BOY ENGINEERING
Light · Scientific recreations
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![An illustration from The United States art directory and yearbook : [1st-2d year] : a guide for artists, art students, travellers, etc. (1888)](https://img.insideoutlibrary.com/img/200/ia-unitedstatesartd02koeh-330-59.webp)
