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

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McINTOSH BATTERY AND OPTICAL CO., CHICAGO, ILL., U. S. A. 9 darkened room. L represents the double achromatic combina- tion lens for high and low power, which is focused by rack-work adjustment S. The lens carrier is fastened at any point by E. Special attention is called to the variety of adjustments possible when, as in the McIntosh Sciopticon, the CONDENSERS, SLIDE CARRIERS and LENS are all MOVABLE. The extra working space thereby gained is of great advantage in many physical experi- ments. NEW MODEL SUNLIGHT OIL LAMP. We take pleasure in presenting to the public a new Four- Wick Oil Lamp, which may be justly regarded as a triumph of skill; effects being produced hitherto deemed impossible of accomplishment with an oil light. The new model four-wick Sun-Light Oil Lamp is the most powerful lamp ever manu- factured for lantern slide projection. The open space beneath