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 494
mall diaphragm makes one revolution the large one makesfive revolutions, and it is then only that the apertures meet and the lightpasses. The bellows behind the objective allows the light to reach the sensi-tized film. The box is, of course, tightly closed. The focusing is done bymeans of a small… … FIG. 23.—ELEVEN SUCCESSIVE ATTITUDES OF A FLYING GULL. Jo this series of images, traced from the originals, the distances representing the positions ofthe bird in space are exaggerated to avoid confusion. 480 MAGIC: STAGE ILLUSIONS AND SCIENTIFIC DIVERSIONS. At the extremity of each baud of film…
Magic tricks
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