Hale, George E. (1924) The spectrohelioscope. Proceedings of the National Academy of Sciences of the United States of America, 10 (8). pp. 361-363. ISSN 0027-8424 http://resolver.caltech.edu/CaltechAUTHORS:HALpnas24a
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Abstract
Monochromatic images of the sun, photographically recorded with the spectroheliograph, reveal the phenomena of the solar atmosphere in projection against the disk. The light from a spectral line of calcium, hydrogen, or other substance is singled out by a narrow second slit, which moves across the plate while the first slit moves across the solar image. A monochromatic picture is thus built up of countless narrow slit images, recorded side by side in slow succession.
| Item Type: | Article |
|---|---|
| Additional Information: | Copyright © 1924 by the National Academy of Sciences. Communicated, July 7, 1924. [A coelostat and a 12-inch objective formerly belonging to the Kenwood Observatory were] [k]indly loaned to me by Professor Frost. The apparatus was set up temporarily in my garden at South Pasadena. |
| Record Number: | CaltechAUTHORS:HALpnas24a |
| Persistent URL: | http://resolver.caltech.edu/CaltechAUTHORS:HALpnas24a |
| Alternative URL: | http://www.pnas.org/content/vol10/issue8/ |
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. |
| ID Code: | 3956 |
| Collection: | CaltechAUTHORS |
| Deposited By: | Tony Diaz |
| Deposited On: | 20 Jul 2006 |
| Last Modified: | 26 Dec 2012 08:57 |
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