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

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20 mcintosh battery and optical co., Chicago, ill., u. s. a. space when folded up of 18 inches long by 6^ inches wide by 14^4 inches high. The manner of ventilating is something new and original, making it the coolest Lantern manufactured. The cells that hold the condensing lenses are easily removable ; each Lantern has a hinge door into which is set a blue glass window, so that at any time the condition of the light can be ascertained without injury to the eyes by looking directly into the powerful light. The lime carriers are builded upon an entirely new prin- ciple, so that any ordinary sized cylinder of lime can be securely held without having to whittle it down to fit. With this Lan- tern, at price quoted, is included two sets of double system plano-convex condensing lenses fully 4^ inches in diameter, 6 inches in focus, mounted in brass cells; one pair accurately matched achromatic objectives, or magnifying glasses, free from chromatic or spherical aberration, wide angles, giving different magnifying powers, with telescope movement for the coarse adjustment, and a rack and pinion mechanical movement for the fine adjustment; two improved adjustable jets, with solid pla- tinum points; our new style Dissolving Key, with special “off- flow" stop cocks designed for use either with gas bags at low pressure or cylinders at high pressure; one pair of slide stops, one pair of slide carriers, and a sufficient quantity of rubber hose for connecting up jets to dissolver. The Chicago Model Stereopticon complete, as above described, is securely packed in a substantial telescope canvas traveling case, which in its turn is packed in a heavy outside case for shipment. PRICE $150 00