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 501
a single objective, a succession of well-separated images whose number dependsonly upon the length of the band employed. The difficulty in using a sensi-tized band consists in arresting it for tlie very brief instant in which eachimage impresses the plate. The Demeny apparatus which we are about… … FIG. 1.—amateurs chronopiiotoguaphic apparatus. aperture, of which only the center is utilized. Back of this objective, and asnear as possible to the sensitized surface, the disk shutter is revolved by meansof a crank. Up to this point there is really nothing new in the apparatus;but the principal…
Magic tricks
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