Lynde, Carleton John, b. 1872, Gilbert, Alfred C. (Alfred Carlton), 1884-1961 · New Haven, Conn. : A.C. Gilbert Co. · leaf 121
I Fig. 179. Binoculars Courtesy of the Scientific American the diverging lens in the other ring holder and wind a tube2 inches long. Insert the second tube in the first and your operaglass is made. Focus it on a distant object. The Prism Binoculars (Fig. 179) are made with lenses sim-ilar to those… … The ProjectingLantern (Fig. 180)consists of a light-proof box, a sourceof bright light, a con-densing lens, a lanternslide, and a projectinglens. The bright light, Fig. 180. A projecting lantern produced by eleCtriC- From Lyndes Physics of the Household, published m t by The Macmiiian Co. lty,…
Light · Scientific recreations
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