Lantern Slide 65: The 1874 Transit of Venus party at the Old Observatory. The 26-inch refractor building in the background. Admiral Davis is behind the Coelostat (hat in hand), Simon Newcomb is seated. Between Davis and Newcomb in Henry Draper. Michelson – seated 3rd from right.
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Photo credit: © Operation 2021 / Alamy / Afripics
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