John H. Noble

M. N. Mosher

T. H. Chastain

Chastain worked in the United States Engineering District Office.

Marietta C. Moore

Marietta C. Moore was a technician in the Health Division at the University of Chicago Met Lab. She signed the Szilard petition.

Ida Cunningham

Ida Cunningham was a laboratory assistant in the Chemistry Division of the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.