M. E. Speed

George Francis McEwen

​George Francis McEwen was born on June 16, 1882 in Manchester, Iowa. He attended Iowa State College.

H. Jack Blackwell

F. C. Lowry

F. C. Lowry worked for the Tennessee Eastman Corporation at the Y-12 Plant.

Margaret M. Emmerson

Margaret M. Emmerson was a technician at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.