A. H. Femmel

Herbert August Potratz

Herbert Potratz was an American chemist. Potratz was born in 1902 in Iowa. He received a B.S., an M.S.

K. K. Kellenberger

Edward F. O’Mara

Staff Sergeant Edward F. O’Mara enlisted in the U.S. Army in 1942. Because of a blood condition, Army officials determined that he was not fit for combat duty.

Dorothy C. Johnson

Dorothy C. Johnson was a stenographer at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.