National Museum of Nuclear Science & History
R. H. Martin worked for the United States Engineer District Office.
Karl Walther was a glassblower for Columbia University and Brookhaven National Laboratory. During the Manhattan Project, Walther worked as a senior glassblower at the Nash Garage Building at Columbia, where scientists developed the gaseous diffusion process.
Glenn Sprankle worked in the shop at the Metallurgical Laboratory in Chicago during the Manhattan Project.
