Group portrait of Mount Wilson and Hale Observatories research staff and staff associates in the Hale Library, Pasadena. Twenty-five (25) men, most of whom are wearing suits and ties, are posed in three rows in front of bookcases. A portrait painting hands amidst the books. Image courtesy of the Observatories of the Carnegie Institution for Science Collection at the Huntington Library, San Marino, California.
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