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IG MCINTOSH BATTERY AND OPTICAL CO.. CHICAGO, ILL., U. S. A. EXHIBITOR’S STEREOPTICON. PRICE, packed In a neat, substantial case, with hinged lid, lock and handle $65.00 The Stereopticon shown in above illustration has an iron frame for base 17 inches long, 7inches wide, nicely japanned. The body is of Russia iron, brass trimmed, and all the parts are fastened together by screws in a firm and durable manner. The door in the side is open to show the arrangement of lime and jet within. Convenient means for raising, lowering or otherwise centering the light, and for trimming the lime are provided. The jet is platina tipped and perfectly adjusted for mixed gases. The raised and open base admits air freely, while the ventilator V is so placed as to draw the .current of heated air away from the condensers, and with it the particles of lime that would otherwise settle upon and obscure the condensers. The slide carrier is movable upon the rods R R, and is fastened firmly in position by the thumb-screw B. The slides may be inserted at the top or side. The sliding brass front .S is retained in position by the brass collar T. Achromatic, double combination lenses for long and short distances, focused by rack and pinion, are furnished with this apparatus. It is made throughout with every attention to detail, so that it can be recommended as a first-class working instrument, that will successfully withstand such hard usage as a traveling exhibitor’s outfit must necessarily receive. For the price it is the most satisfactory Stereopticon in the market.