. Annual report of the Board of Regents of the Smithsonian Institution. Smithsonian Institution; Smithsonian Institution. Archives; Discoveries in science. HISTORY OF OIIRONOPHOTOGRAPHY. 327 traverses the film, /, which carries the positive photographs, and these photographs, magnified by the objective, are thrown upon the screen. The motion of the film at its halts at each flash :ire brought about by an apparatus not shown in the figure. It is similar to that of the simple chronophotographic apparatus, with the difference that the positive film, having its ends fastened together to make an en
. Annual report of the Board of Regents of the Smithsonian Institution. Smithsonian Institution; Smithsonian Institution. Archives; Discoveries in science. HISTORY OF OIIRONOPHOTOGRAPHY. 327 traverses the film, /, which carries the positive photographs, and these photographs, magnified by the objective, are thrown upon the screen. The motion of the film at its halts at each flash :ire brought about by an apparatus not shown in the figure. It is similar to that of the simple chronophotographic apparatus, with the difference that the positive film, having its ends fastened together to make an endless belt, passes over a scries of rollers which stretch it taut. The princi- pal imperfection of the chronophotographic projector was a jerkiness due to imperfect equality of the intervals. Wo. 11. Edisotfs kinetoscope, 1891^.—Mr. Edison found a means of equalizing the intervals. It was to perforate the sensitive film ))\ a. Fig. 17. series of equidistant holes and gear it to a pin cylinder. It was impos- sible to procure a kinetoscope to exhibit in the glass case; but every- body, of late 3'ears, has seen this remarkable instrument in action. It shows living scenes acted out for more than a minute with absolute precision. In Edison's apparatus the film-ribbon never was arrested; but the images were rendered sharp by the extreme brevity of the illumination, which was only T„10I) of a second. A single spectator, looking through eyepieces, could see the living pictures of the kinetoscope. No. 12. Lumiere's cinematograph, 1895.—This instrument finally gave the desired result—that is to say, the projection on a screen of. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Smithsonian Institution. Board of Regents; United States National Museum. Report of the U. S. National Museum; Smithsonian Institution.
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