Optic projection : principles, installation and use of the magic lantern, projection microscope, reflecting lantern, moving picture machine (1914)

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62 SOME AMERICAN MAGIC LANTERNS [CH. I FIG. 36 B. CONDENSER LENS NEXT THE RADIANT IN ITS MOUNT. This is a'picture of the end of the condenser next the radiant of the lantern shown in fig. 36 A. The lens is held in place by four thin metal supports, fastened at one end to the condenser mount, and hooked over the edge of the condenser at the other. The lens is considerably smaller than the condenser mount, thus giving abundant room for expansion. i, 2, 3, 4. The four thin metal strips for holding the lens in position. They are white where they hook over the edge of the lens. c End view of the metal tube supporting the condenser. (The white spots in the condenser face are mirror images of the windows near where the picture was taken). FIG. 37. MAGIC LANTERN WITH TWO-LENS CONDENSER, AND HAND-FEED ARC LAMP. (Portable Sciopticon. Cut loaned by the Mclntosh Stereopticon Co.).