Two men with loaded 3-ton truck at the construction site for the 100-inch telescope, Mount Wilson Observatory. George Jones is on the left, facing away from the camera. The unidentified man on the right is wearing coveralls. Both men are wearing hats. The truck carries a load of lumber. Trees are visible in the background, behind the truck. Image courtesy of the Observatories of the Carnegie Institution for Science Collection at the Huntington Library, San Marino, California.
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