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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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.
|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.|
|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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