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Willis H. Shapley addressing guests at the dedication of the 60-inch telescope, Palomar Observatory. Shapley is standing behind a podium inside the Oscar G. Mayer memorial building, which houses the telescope. The crowd of unidentified men and women is seated in chairs in front of Shapley. A small portion of the telescope is seen in the upper right-hand corner of the photograph. The ladder leading to the observatory's balcony is seen in the background, to Shapley's left. Image courtesy of the Observatories of the Carnegie Institution for Science Collection at the Huntington Library, San Marino, California.