National Museum of Nuclear Science & History
H. R. Chapman worked for the H. K. Ferguson Company.
Haskell Sheinberg arrived at Los Alamos in late 1944 as part of the Special Engineer Detachment. Sheinberg’s first assignment was to purify plutonium under the direction of Arthur Wahl, one of the co-discoverers of plutonium.
R. F. Perkins worked for the Union Carbide & Carbon Corporation.
