Photo of a 60-inch cyclotron deflector mount with physicists Dale Corson and Donald Cooksey in 1939.
Lawrence Berkeley National Laboratory
1939-05-10
<a rel="nofollow" class="external text" href="https://catalog.archives.gov/id/7665207">60-inch cyclotron deflector mount, Dale Corson and Donald Cooksey taken May 10, 1939. Cooksey 1 (Photographer: Donald Cooksey)</a>, U.S. National Archives and Records Administration