National Museum of Nuclear Science & History
S. M. Kelly worked for the Roane-Anderson Company.
Olge W. Hess was a research assistant at the University of Chicago’s Metallurgical Laboratory.
H. O. Arnold worked for the Kellex Corporation at the K-25 Plant.
James Downey was a laboratory helper at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
