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On the Nature of Sun-Spots

Hale, George E. (1919) On the Nature of Sun-Spots. Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 95 (668). pp. 234-236. ISSN 1364-5021. doi:10.1098/rspa.1919.0004.

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The researches described in the present paper were undertaken in connection with a more general investigation of the sun, considered as a typical star. The gradual development of the work dates from 1891, when three attacks, along converging lines, were begun by the writer at the Kenwood Observatory. One of these involved a study of the spectra of sun-spots, requiring the development of instruments and methods adequate to record photographically the minute peculiarities of their widened lines. The second was a photographic investigation of the solar atmosphere, rendered possible by the initiation and gradual improvement of the spectroheliograph. A series of laboratory experiments was also undertaken for the purpose of interpreting the phenomena detected in both of these series of researches.

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Additional Information:© 1919 The Royal Society. (Abstract.--Received October 31, 1918.)
Issue or Number:668
Record Number:CaltechAUTHORS:20150811-091340905
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Official Citation:On the Nature of Sun-Spots Author(s): George E. Hale Source: Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character, Vol. 95, No. 668 (Jan. 1, 1919), pp. 234-236 Published by: The Royal Society DOI: Stable URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:59379
Deposited By: George Porter
Deposited On:11 Aug 2015 16:32
Last Modified:10 Nov 2021 22:19

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