Background
Ira Sprague Bowen, a physicist by training, was the third director of the Mount Wilson
Observatory. As director, he led the Observatory through its biggest transition since its
founding in 1904: its joint operation of the largest telescope in the world, the 200-inch
Hale Telescope, with the California Institute of Technology. Even though his formal
scientific output fell off as director, his position of responsibility for the Mount
Wilson and Palomar Observatories marks him as a very important figure in the history of
American science.
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