Photographic observations of the spectra of sun-spots
By: by George E. Hale and Walter S. Adams. Reprinted from the Astrophysical journal, vol. XXIII, p. 11-44, January 1906.
Contributors: Adams, Walter Sydney, 1876-1956, joint author.
Series: Contributions from the Solar Observatory, Mt. Wilson, California,; no. 5
Published: 1906
Place of publication: [Chicago
Language: eng
Number of pages: 34
Subjects: Sunspots.
Notes: Cover-title.
At head of title: Carnegie Institution of Washington.
Double paging.