National Museum of Nuclear Science & History
H. R. Chapman worked for the H. K. Ferguson Company.
Robert Coveyou was a mathematician and health physicist that worked at both the Met Lab in Chicago and at the X-10 graphite reactor in Oak Ridge, Tennessee.
Seymour Calvert served for 11 months in the Special Engineering Detachment at Los Alamos. He specialized as a chemical engineer, and carried out experiments with beryllium that were often dangerous.
