Mr. Belin. Well, when you ran these tests you had understood that the man, Oswald, had fired a pistol, too, hadn't he?
Mr. Day. Yes, sir.
Mr. Belin. Would you expect to have any positive tests from a pistol on the cheek?
Mr. Day. I would expect more with a revolver with an open cylinder than I would from a rifle. Actually, for most practical purposes, I would not be surprised if there would be no nitrates from a man firing a rifle.
Mr. Belin. What about on the hands?
Mr. Day. Even on the hands. It is possible, but it is more likely with a revolver where you have a revolving cylinder and an opening between the cylinder and the actual barrel where the nitrates can come out.
Mr. McCloy. That was the type of pistol that was used to kill Tippit, wasn't it?
Mr. Day. Yes, sir.
Mr. McCloy. Did the paraffin show up nitrate?
Mr. Day. Yes, sir; nitrates were present on the cast made of Oswald's hands.