Reports on Observations of the Total Eclipse of the Sun

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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 Harknesa and Eastman, and Dr. Curtis. 11. 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 chronometer. B. Photographic. Dark-room. Hh. Doors. Ii. Dumb-waiters for passing plate-holders in and out of darkroom. Kk. Windows, closed by shutters. Ill. Shelves. 7n. Trough of water, holding the baths for negatives. 77. 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. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully, any imperfections that remain are intentionally left to preserve the state of such historical works.