Mr. Frazier.

fine marks will extend for a short distance, then disappear, and a new mark of a new type will begin and extend for a short distance. The entire surface, then, will have a--be composed of a series of circles, but the individual marks seen in the microscope will not be circular, will not form complete circles around the face of the bolt.

Mr. Eisenberg.

Have you had occasion to examine two consecutive bolt faces from a factory?

Mr. Frazier.

Oh, yes.

Mr. Eisenberg.

And what did you find on that examination?

Mr. Frazier.

There would be no similarity in the individual microscopic characteristics between the two bolt faces.

Mr. Eisenberg.

There actually was none?

Mr. Frazier.

No, there was none.

Mr. Eisenberg.

In the bolt face with which we are dealing, Exhibit 139, can you say from inspection whether the markings on that bolt face are predominantly the accidental markings introduced subsequent to manufacture, or the markings of the manufacture?

Mr. Frazier.

I would say that these were filing marks for the most part which were made during manufacture, some of which have been obliterated and changed through use possibly corrosion.

Mr. Eisenberg.

Mr. Frazier, taking Exhibit 543, did you prepare a photograph of this exhibit?

Mr. Frazier.

Yes, sir.

Mr. Eisenberg.

Compared with the test cartridge case?

Mr. Frazier.

Yes, sir; this is the photograph, showing the test cartridge case from Exhibit 557 on the right and the cartridge case 543 on the left.

Mr. Eisenberg.

This was prepared by you or under your supervision?

Mr. Frazier.

Yes, sir.

Mr. Eisenberg.

Mr. Chairman?

Representative Boggs.

It may be admitted.
(The item referred to was marked Commission Exhibit No. 559 and received in evidence.)

Mr. Eisenberg.

Now, that is marked on the left C-14, and on the right, C-6.

Mr. Frazier.

Yes, sir.

Mr. Eisenberg.

And the left-hand photograph is a photograph of what?

Mr. Frazier.

Of the cartridge case 543.

Mr. Eisenberg.

That is the actual fired case?

Mr. Frazier.

Yes, sir; it shows just a portion of the primer, and a very small portion of the firing- pin impression.

Mr. Eisenberg.

And the right-hand side of that photograph, marked C-6?

Mr. Frazier.

It is a test cartridge case, fired in the rifle Exhibit 139.

Mr. Eisenberg.

What is the magnification, Mr. Frazier?

Mr. Frazier.

Approximately 100 diameters.

Mr. Eisenberg.

And is that magnification equal on both sides of the picture?

Mr. Frazier.

Yes, sir.

Mr. Eisenberg.

Did you make your identification of Exhibit 543, that is the identification of that exhibit as having been fired in the rifle 139, on the basis of your examination under the microscope, or on the basis of the photograph?

Mr. Frazier.

Under the microscope. The photograph has no relationship whatsoever to the examination.

Mr. Eisenberg.

Can you explain that?

Mr. Frazier.

The examination is made microscopically through the use of your eyes, and your eyes will record depths and shapes to a much greater extent than can be shown in a photograph. So that the examination and comparison is made of these irregular surfaces mentally, rather than mechanically by any means. The photograph is taken primarily to illustrate the types of marks found and their location, relatively, on the specimen.

Representative Boggs.

We will have to adjourn and come back at 2.
(Whereupon, at 12:15 p.m., the President's Commission recessed.)