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Group photo of the attendees of the fourth conference of the International Union for Cooperation in Solar Research on Mount Wilson. There are approximately 75 unidentified people in the photograph, 2 of whom are women (front, center). The group is standing in front of a shingled one-story building on Mount Wilson; a tarpaulin is draped over the roof of the building. All of the male attendees are wearing suits, some of them are wearing hats and others are holding their hats. The two women are wearing dresses. The windows in the front of the building are visible behind the group of people. Trees are in the background, behind the building. Image courtesy of the Observatories of the Carnegie Institution for Science Collection at the Huntington Library, San Marino, California.
International Union for Co-operation in Solar Research Mount Wilson Observatory Mount Wilson (Calif.) Dwellings Windows Tarpaulins Trees Suits (Clothing) Hats Dresses Group portraits Portrait photographs Group portraits. (gmgpc) Portrait Photographs. (aat) Photographic prints. (gmgpc)