Robert E. Fryxell

C. M. Cummins

Cummins worked in the United States Engineer District Office.

C. Cannon

C. Cannon was a research associate at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

D.M. Ellett

​D. M. Ellett is a mechanical engineer who joined the Manhattan Project after the end of World War II.

J. E. Metcalf