Mount Wilson Observatory's original office building (left) and new physical laboratory (right), Pasadena, California. Both buildings appear to be brick structures; windows and doorways are visible. Grass lawns, new plants, a sidewalk and street are visible in the foreground. To the left-hand side, domestic houses are seen. Electric utility poles and wire are seen in the background. Image courtesy of the Observatories of the Carnegie Institution for Science Collection at the Huntington Library, San Marino, California.
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