The three Mayer brothers at Palomar Observatory, standing next to the dedication plaque of the Oscar G. Mayer memorial building, in honor of the dedication of the 60-inch telescope. The man in the center is Oscar G. Mayer, Jr. The three men are wearing suits, neckties, and coats. Image courtesy of the Observatories of the Carnegie Institution for Science Collection at the Huntington Library, San Marino, California.
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