Crawford Greenewalt: Crawford Greenewalt. I’m named after my father, Crawford Hallock Greenewalt. The last name, Greenewalt, is spelled G-R-E-E-N-E-W-A-L-T. But in early years in the country, the Greenewalt’s spelled their name various ways. The present spelling may go back several generations.
Corporate Involvement in the Manhattan Project
Nancy Greenewalt Frederick: My father, Crawford Greenewalt, was the only child of Dr. Frank Lindsay Greenewalt and Mary Hallock Greenewalt. Dr. Greenewalt was a physician at Gerard College in Philadelphia, and my father grew up there most of his young life. He went to a German school, what we would call a preschool, run by German monks when he was a child. He says he spoke German before he spoke English. But when he was grown up he could do some German, but he couldn’t speak it.
Stephane Groueff: Interview with Dr. Clarence Larson—L-A-R-S-O-N—head of the Union Carbide’s operations at Oak Ridge, a chemist. Dr. Larson was connected with the electromagnetic separation process during the war, and he was a personal friend of Dr. Lawrence [Ernest O. Lawrence]. He’s married to the daughter of Dr. Stafford Warren, who was also with the project. You came in 1942?
Dr. Clarence Larson: Yes.
Groueff: From where?
Stephane Groueff: Mr. Hobbs, part three.
J.C. Hobbs: The discussion in connection with piping and all of these fancy bends. Badger Company in Boston, I think, had the contract for the copper expansion joints.
Groueff: Between pipes?
General Kenneth Nichols: —found we did not have the authority to satisfy DuPont.
Stephane Groueff: But why did DuPont challenge your authority?
Nichols: Because they had trouble, in World War I, being called munitions makers and investigated after World War I, so they are more conservative than most companies. And they wanted to have in their files copies of our authorities. And what we had, which I have shown you, and that is satisfactory to them.
Groueff: I see.
Stephane Groueff: [Enrico] Fermi had the characteristics of a real genius.
Colonel Franklin Matthias: Almost every time you would get in contact with him, something would come up that was impressive. Physically, he was a small man, unimpressive person, but he grew real large when he started talking about things he knew.
Groueff: Was he a friendly person?
Matthias: Yes, warm; very warm, very friendly, a real nice person.
Stephane Groueff: It is working. Mr. Stapleton, you were with security during the Hanford period, or you were already here with security in DuPont in Wilmington?
Newton Stapleton: I was in the security prior to Hanford. At the beginning of the war, DuPont got involved in building a plant for the French and British down at Memphis, Tennessee. Then as our country became more involved, we got involved in trying to please or satisfy the government from the Air Force, the Army, the Navy, the Coast Guard and everything.
Stephane Groueff: Mr. Hobbs, part two. So to go now to how you were contacted for the Manhattan Project.
J.C. Hobbs: You see, [Ludwig] Skog was one in the group and had me in on –
Groueff: And [William Francis] Gibbs.
Stephane Groueff: Hello. Colonel Matthias, if you can tell me the story of how the plutonium was shipped.
Colonel Franklin Matthias: Is this good enough.
Groueff: Yeah, it is good enough. The plutonium was shipped from Hanford to—?
Matthias: To Los Alamos.
Groueff: To Los Alamos.
Philip Abelson conducted research on the liquid thermal diffusion method of isotope separation at the Philadelphia Navy Yard. This process was utilized for the S-50 Plant at Oak Ridge.
In September 1944, several workers were injured while trying to fix a clogged tube in the transfer room of the liquid thermal diffusion semi-works at the Philadelphia Navy Yard.