Illustrated Catalogue Of Magic Lanterns (after November 1889, probably 1890)

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62 MoINTOSH BATTERY AND OPTICAL CO., CHICAGO, ILL., U. S. A. CONDENSING LENSES, PLANO CONVEX, GROUND EDGES. 1 % inches in diameter, unmounted S 2 00 2 ^ * 1 * 1 3 3'A 4 4 ^ 5 6 7 8 9 10 2 50 2 75 3 00 3 50 4 00 6 50 7 75 9 00 10 25 11 50 13 00 COSMORAMA LENSES. 7 inches in diameter, double or piano convex lens, 30, 36, 48 and 72-inch focus 6 inches in diameter, double or piano convex lens, 24, 30 36 48 and 72-inch focus 5 inches in diameter, double or piano convex lens, 18, 20, 24, 30, 36, 48 and 72-inch focus 4 inches in diameter, double or piano convex lens 1 25 The lens that is 6 inches in diameter, and from 24 to 36 inches in focal length, is the one commonly used. $ 3 00 2 50 1 75 PLANO, OR DOUBLE CONVEX LENSES, GROUND EDGE. inch focus, tV inch diameter, }i inch diameter, A inch diameter, y inch diameter, inch diameter, y inch diameter, 1 H inch diameter, \y inch to % inch diameter, \y inch to 1 y inch to Y& inch to y .3 inch to y inch to inch to tV inch focus, A inch focus, inch focus, y inch focus, y inch focus, y inch focus, inch focus, $ .65 .65 .65 .75 .75 .75 .85 .85