M. J. Holman

Howard C. Hoffman

Phil Belcher

H. O. Arnold

H. O. Arnold worked for the Kellex Corporation at the K-25 Plant.

Mary Lou Curtis

Mary Lou Curtis joined the Manhattan Project in Dayton, Ohio in 1943. Mrs. Curtis worked in the Counting Room at Monsanto’s Unit III facility, where she developed new methods to measure and analyze radioactive materials, such as polonium, which was used as the trigger for the atomic bombs.