National Museum of Nuclear Science & History
J. D. McPherson worked for the United States Engineer District Office.
Ambroso Hoelscher was a laboratory assistant at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Calkins worked at the 200 West Area at Hanford during the Manhattan Project.
F. A. Davis worked for the Tennessee Eastman Corporation at the Y-12 Plant.
