Below, there are at the lower arrow some additional marks. These begin to come to the edge of the primer. What we are looking at here is actually the primer of the cartridge case, and the marks are the breech-block markings as the result of the pressure of the set-back of the shell.
I have a sequence of these where the division moves across. Do you want to introduce all of them?
Mr. Eisenberg. Yes; I think we should mark them in evidence.
Mr. Nicol. All right.
This would be the dividing line of the comparison bridge moved over a small portion. You see the entire flat area here, but the match has now shifted over slightly.
Mr. Eisenberg. I am holding two photographs, both marked Q-48 and K-1. You took both photographs?
Mr. Nicol. Yes, sir.
Mr. Dulles. I wonder if, for clarification, we could take one of those shells and see from what angle the photograph is taken and what is covered in the photograph. I am a little confused. It doesn't make any difference which one.
Mr. Nicol. All right, sir.
The area shown between this dark ring would represent the area between these two grooves right here. Actually, it is the entire primer. This is the firing-pin impression you are looking at right here.