Portrait of Thomas S. Gregory, standing next to a piece of scientific equipment. Photograph by Douglas Cunningham. The handwritten notes in the outer margins of the photograph reads: "Thomas S. Gregory: Technical Assistant to the Director. Photo by Douglas Cunningham, May 31, 1982". Gregory is wearing a shirt, a sweater and corduroy pants. Image courtesy of the Observatories of the Carnegie Institution for Science Collection at the Huntington Library, San Marino, California.
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