Walter Roth

F. R. Grim

Grim worked for Stone and Webster Engineering Corporation.

Robert Kupp

Robert Kupp joined the Manhattan Project at Oak Ridge in January 1945. Kupp was a supervisor in the Line Recorder Department at K-25, where he monitored a mass spectrometer that determined the concentration of various material in the cascade while it was being processed.

Jake Lewis

Jake Lewis worked for the U.S. Vanadium Company.

John C. Matheson