Reports on Observations of the Total Eclipse of the Sun: August 7, 1869 (Classic Reprint) - Softcover

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Excerpt from Reports on Observations of the Total Eclipse of the Sun: August 7, 1869

Plate I. View of the temporary observatory at Des Moines, occupied by Professors Harkness and Eastman, and Dr. Curtis. II. Ground plan of the above. Aa. Observing room. A. Door. Bbb. Shelves. 0. Table. (1. Professor Eastman's telescope. 6. Professor Harkness's telescope. F. The equatorial for photography. 9. Tripod stand for ehronometer. B. Photographic. Dark-room. Kh. Doors. Ii. Dumb-waiters for passing plate-holders in and out of darkroom. Kk. Windows, closed by shutters. 111. Shelves. M. Trough of water, holding the baths for negatives. A. Trough with grooved sides for fixingobath. O. Sink, composed of a wash-tub with India rubber waste-pipe. P. Barrel of water, with pipe and stop-cock projecting through wall of dark-room. III. Triangulation connecting the various temporary observatories at Des Moines in August, 1869. IV. Spectroscope used by Professor Harkness. V. Spectra of the corona and red prominences, observed by Professor Harkness. VI. Curves showing the readings of the barometer and thermometer, by Professor Eastman. VII. Curves showing the readings of the wet bulb and sun thermometers, by Professor Eastman. VIII. Curves showing the readings of the actinometer and photometer, by Professor Eastman. IX. Colored drawings of the totally eclipsed sun as seen at Des Moines, by Professor Eastman. X. Fac-simile of Dr. Curtis's first photograph of the totally eclipsed sun at Des Moines. XI. Fac-simile of Dr. Curtis's second photograph of the totally eclipsed sun at Des Moines.

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