Papers, etc.
Some of Babcock’s papers are at the Huntington Library. The AIP Niels Bohr Library & Archives has a 1962 Manuscript Autobiography (38 pp.), as well as 1975 and 1977 oral history interviews of Horace Babcock and others who worked with Harold Babcock.
Other References: Historical
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Adams, Walter S., “Early Solar Research at Mt. Wilson,” Vistas in Astronomy 1, 619-623 (1955).
Babcock, Harold D., “George Ellery Hale,” PASP 50, 156-65 (1938).
Babcock, Harold D., “In 1903,” PASP 51, 19-23 (1939) [poem recounting first visit to Mt. Wilson].
Babcock, Horace W., “Diffraction Gratings at the Mount Wilson Observatory,” Physics Today 39, 7, 34-42 (1986).
Howard, Robert, “Eight Decades of Solar Research at Mt. Wilson,” Solar Physics 100, 1-2, 171-187 (1985).
Hufbauer, Karl, Exploring the Sun: Solar Science Since Galileo (Johns Hopkins Univ. Press, Baltimore, 1991).
Sandage, Allan, Centennial History of the Carnegie Institution of Washington. Vol. 1, The Mount Wilson Observatory: Breaking the Code of Cosmic Evolution (Cambridge Univ. Press, Cambridge, UK, 2004).
Simmons, Michael, “The History of Mount Wilson Observatory: Bringing Astronomy to an Isolated Mountaintop,” (Mt. Wilson Observatory Association, 1983).
Other References: Scientific
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Babcock, Harold D., “The Zeeman effect for Chromium,” Ap.J. 34, 217-33 (1911).
St. John, Charles E. & Harold D. Babcock, “Wave-Lengths of Lines in the Iron Arc from Grating and Interferometer Measures λ 3370 – λ 6750,” Ap.J. 53, 260-99 (1921).
Babcock, Harold D., “A Study of the Infra-Red Solar Spectrum with the Interferometer,” Ap.J. 65, 140-62 (1927).
Babcock, Harold D., “A Photographic Study Of the Solar Spectrum in the Region λ10000 to λ11000 A,” PASP 41, 274-76 (1929).
Babcock, Harold D., “The Construction and Characteristics of Some Diffraction Gratings,” PASP 45, 283-88 (1933).
Russell, Henry Norris, Harold D. Babcock, & Charlotte E. Moore, “Series Lines of Magnesium in the Solar Spectrum,” Phys. Rev. 46, 826-27 (1934).
Babcock, Harold D., Charlotte E. Moore, & Wendell P. Hoge, “A Scale of Wave-Lengths in the Infra-Red Solar Spectrum,” Ap.J. 83, 103-20 (1936).
Babcock, Harold D., “Chemical Compounds in the Sun.,” Ap J. 102, 154-67 (1945).
Babcock, Harold Delos & Charlotte E. Moore, “The Solar Spectrum λ2914–λ3060,” Astronomical Journal 52, 41 (1946).
Babcock, Harold D., Charlotte E. Moore, & Mary F. Coffeen, “The Ultraviolet Solar Spectrum, λλ2935 to 3060,” Ap.J. 107, 287-302A (1948) [Errata].
Babcock, Harold D. & Horace W. Babcock, “The Ruling of Diffraction Gratings at the Mount Wilson Observatory,” Astronomical Journal 56, 120 (1951).
Babcock, Horace W. & Harold D. Babcock, “Mapping the Magnetic Fields of the Sun,” PASP 64, 282-87 (1952).
Babcock, H.W. & H.D. Babcock, “Photospheric Magnetic Fields,” in Electromagnetic Phenomena in Cosmical Physics, Proceedings from IAU Symposium no. 6. Edited by B. Lehnert. International Astronomical Union. Symposium no. 6, (Cambridge University Press, 1958), pp. 239-47.
Babcock, Harold D., “The Sun’s Polar Magnetic Field,” Ap.J. 130, 364-65 (1959).
Other Works: Popularizations, History, etc.
Babcock, Harold D., “Astronomy without a Telescope,” Popular Astronomy 43, 81-92 (1935).
Babcock, Harold D., “What’s in the Air?” Astronomical Society of the Pacific Leaflets 6, 322-29 (1953) [Leaflet #291, the address given on receipt of the Bruce Medal].