National Museum of Nuclear Science & History
MacDonald was a member of the Instrument Section at the University of Chicago’s Metallurgical Laboratory.
Joseph (J.) Garrott Allen was a research associate in the Health Division of the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Lyman Parratt (1908-1995) was an American physicist. Parratt was born in Salt Lake City. He studied at the University of Utah and earned a Ph.
Harvey L. Piepho served in the First Ordnance Squadron.