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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Abstract
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.
| Item Type: | Article |
|---|---|
| Additional Information: | Copyright © 1926 by the National Academy of Sciences. Communicated April 25, 1926. |
| Record Number: | CaltechAUTHORS:HALpnas26 |
| Persistent URL: | http://resolver.caltech.edu/CaltechAUTHORS:HALpnas26 |
| Alternative URL: | http://www.pnas.org/content/vol12/issue5/ |
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. |
| ID Code: | 3954 |
| Collection: | CaltechAUTHORS |
| Deposited By: | Tony Diaz |
| Deposited On: | 20 Jul 2006 |
| Last Modified: | 26 Dec 2012 08:57 |
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