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 529
lds 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 tension adjusted by screw nuts, as shown. Eeferring to thediagram, two slotted diaphragm cards will be seen. These are placed over theground… … RIBBON PHOTOGRAPHY—DIAGRAM OP THE PRINTING DEVICE. the negative film, as a wliole, should be thin, then a card with a narrow slot isused, which allows a short exposure to be made if the negative and film arepassed under it. If the negative is fall of density, then the narrow card isremoved, and the…
Magic tricks
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