. Annual report of the Board of Regents of the Smithsonian Institution. Smithsonian Institution; Smithsonian Institution. Archives; Discoveries in science. HISTORY OF CHRONOPHOTOGRAPHY. 321 black hole farinj^ the first. | In oi-dcr to iippioxiniate to these ideal conditions, the writer constructed a deep shed tapestried with black velvet and facing- so that no light penetrated it. In that way very sharp images are obtaincnl upon an unclouded Fig. 6. No. 5. Figures in rchef (Mained hy the use of chronophofography.— A single apparatus onl}^ gives the projection of the motions on a p
. Annual report of the Board of Regents of the Smithsonian Institution. Smithsonian Institution; Smithsonian Institution. Archives; Discoveries in science. HISTORY OF CHRONOPHOTOGRAPHY. 321 black hole farinj^ the first. | In oi-dcr to iippioxiniate to these ideal conditions, the writer constructed a deep shed tapestried with black velvet and facing- so that no light penetrated it. In that way very sharp images are obtaincnl upon an unclouded Fig. 6. No. 5. Figures in rchef (Mained hy the use of chronophofography.— A single apparatus onl}^ gives the projection of the motions on a plane perpendicular to the optical axis of the instrument. But if three chronophotograph cameras are focused on dark fields or dead-black. 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. Report of the Secretary. Washington : Smithsonian Institution
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