Hale, George E. (1926) Visual observations of the solar atmosphere. Proceedings of the National Academy of Sciences of the United States of America, 12 (5). pp. 286-295. ISSN 0027-8424 http://resolver.caltech.edu/CaltechAUTHORS:HALpnas26
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The spectrohelioscope, an instrument for observing the sun in monochromatic light, has been briefly described in a previous article. (1) The same optical parts employed in the preliminary work are now rigidly mounted in a vertical position in my new Solar Laboratory in Pasadena (a branch of the Mount Wilson Observatory). The second mirror of the coelostat, which stands at the summit of a low tower, sends the sun's rays vertically downward to a 30-cm. objective (kindly loaned me by the Yerkes Observatory) which forms a 5-cm. image of the sun on the slit of a spectroscope standing in a well excavated in the earth below the laboratory at the base of the tower.
|Additional Information:||Copyright © 1926 by the National Academy of Sciences. Communicated April 25, 1926.|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Tony Diaz|
|Deposited On:||20 Jul 2006|
|Last Modified:||26 Dec 2012 08:57|
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