National Museum of Nuclear Science & History
H. J. Mack worked for the Edenfield Electric Company.
Robert E. Johnson was a research assistant at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
D. W. King worked for the Tennessee Eastman Corporation at the Y-12 Plant.
N. F. Smyth worked for the Kellex Corporation at the K-25 Plant.
