Magic; stage illusions and scientific diversions, including trick photography (1897)
Hopkins, Albert A. (Albert Allis), 1869-1939, Evans, Henry Ridgely, b. 1861 · London : Low · leaf 528
a siDecial square shape, and give the squaresprocket wheel of the propelling pulley a better tension on the film. The teethpass through the perforations of both films, causing both to move at exactlythe same time, and at all times to keep in perfect registry. The speed of thefilm passing under the… … RIBBON PHOTOGRAPHY—EXPOSING AND PRINTING APPARATUS. motor has worm gear operating a cog wheel on the main shaft. The V-shapedelastic band holds the frame in which is a ground glass in contact with the film,producing a kind of tension on the film. To the left of the liglit chamber isa supplementary…
Magic tricks
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