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200 LIVING PICTURES front part of the apparatus carries the film mechanism, film spools, and all the projector machinery. The film is contained, to start with, in the upper spool box A, which holds about 1,500 feet of film, and after passing through the projector is spooled in the lower spool box A'. Both spool boxes are fireproof, and are fitted with fire-trapped slots, T, designed for the purpose of preventing fire spread- ing into the spool boxes if the film happens to catch fire. The film is drawn from the upper spool box by a sprocket, K, which is continuously rotated from the driving shaft F, and the edges of the film are kept in engagement with the sprocket teeth by a resiliently mounted spring roller k. A loop, /, is left between the sprocket K and the gate G, which is being continuously fed and intermittently drawn in as the film passes through the gate. This loop prevents any tension on the film while it is stationary in the gate. The feed sprocket is seen at S, and the film is pressed against the sprocket by extensions, X, X, of the runners W on the hinged back of the gate. These runners exert a yielding pressure on the edges of the film, and the pressure is adjustable. A second loop, /', is left between the feed sprocket S and the continuously-rotating take-up sprocket K', which is on the main driving shaft F, turned by the handle h. The edges of the film are pressed against the sprocket K' by resiliently-mounted rollers similar to the upper roller k. All the sprockets and rollers over which the film passes are shaped so that the film is in contact therewith only at the edges, and not on the face of the film. The film thus travels through the machine in a hollow track. The shaft t, on which the take-up spool is mounted, is positively driven by bevel and shaft gearing from the main driving shaft F, and the spool is driven by a spring friction clutch, so that the speed of the spool may accommodate itself as the diameter of the film wound increases, and at the same time prevent the film being wound loosely on the shaft. The slip gear can be adjusted