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

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418 MOVING PICTURE FILM AND MECHANISM [Cn. XI Next, it is necessary to get the film right side out, otherwise, everything will be reversed and appear as if seen in a mirror, an especially troublesome state of affairs when titles or letters are shown. The side of the film which has the emulsion appears rough, the other side is smooth and shiny. The film often has a tendency to curl, the emulsion being on the concave side. The film is turned so that the rough, emulsion side bearing the picture is toward the light. When it is wound correctly on the reel, and the emulsion side is turned so it will face the light as the film unwinds, the reel of film is put in the upper magazine. The end of the film is pushed through the opening in the magazine between the rollers of the fire-trap. This can best be done by using the index and middle fingers to hold the film. FIG. 233. EDISON KINETOSCOPE MECHANISM. (Cut loaned by the Edison Manufacturing Company) The magazine doors are open showing the film reels. The film is in place ready to project.