J. F. Downey

L.W. Hamblin

Hamblin worked in the United States Engineer District Office.

Howard Lange

Howard Lange was the Curator in the Chemistry Division at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

Frank E. Keene

Frank E. Keene was a janitor at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

J. P. O’Hara