National Museum of Nuclear Science & History
J. P. Hogan worked for Hanley & Company.
Grace R. Harvey was a laboratory technician in the Health Division of the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Twichell worked at 200 West Area at Hanford during the Manhattan Project.
W. A. Collins worked for the Poe Piping & Heating Company.
