A. F. Young

Theodore F. Harlow

H.W. Abbott

H.W. was a consultant at Metallurgical Laboratory in Chicago during the Manhattan Project.

E. M. Niles

Niles worked for Stone and Webster Engineering Corporation.

Opaline Calhoun

Opaline Calhoun was a laboratory technician at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.