(Left to Right): Mrs. Louise Whitfield Carnegie, Margaret Carnegie, Evelina Conklin Hale, Margaret Hale, and Andrew Carnegie in the machine shop at Mount Wilson Observatory's Pasadena laboratory on Santa Barbara Street. An unidentified man is standing behind Andrew Carnegie. All of the women are wearing coats and hats; Andrew Carnegie is wearing a suit. Image courtesy of the Observatories of the Carnegie Institution for Science Collection at the Huntington Library, San Marino, California.
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