In this chart I have enlarged the hairs, taking them under approximately 400 diameters, so we can look into the hair. Here we begin to see the real differences between the hairs among the various races.
In the Caucasian race, the cuticle, in other words, the layer of scales around the outside of the hair, is medium to thick.
In the Negroid hair the cuticle is very thick. In the Mongoloid hair the cuticle is very thick.
Pigmentation in the cortex, which gives the hair the color, in Caucasian hair is very fine to coarse and is very evenly distributed throughout the cortex of the hair. In Negroid hair the pigment is medium to coarse, but the big difference is that the pigment granules are clumped together, leaving large white-gapped areas throughout the cortex of the hair.
In the Mongoloid hair, the pigment is medium to coarse but it is very heavily distributed throughout the hair. As you can see, in the Caucasian hair the cortex is relatively light. In Negroid hair it is clumped, and in Mongoloid hair it is dense.
Mr. Eisenberg. Mr. Chairman, may I have this chart admitted as 669?
Mr. Dulles. It is admitted as 669.
(Commission Exhibit No. 669 was marked, and received in evidence.)
Mr. Eisenberg. You have a chart here "Racial Determination of Hairs," and no subcaption, is that right?
Mr. Dulles. You haven't asked for this other to be admitted, have you?