LESSON 27.] 



HAIR. 



83 



out pigment in the medulla ; that portion of the cortical substance 

 which joins the cuticle is much darker in color in the Negro and In- 

 dian than in the white races, and this remark applies to the cortical 

 substance generally. The hair from the head of a full-blooded Me- 

 nomonee Indian (Fig. 129) agrees in all general characteristics with 

 those already described. 



440. Hairs of the beard are usually much larger and coarser 



FIG. 130. 



FIG. 129. 



Transverse section of hair of 

 Menomonee Indian. 



Hair of the beard, white man; a, cuticular 

 layer; >, cortical substance ; c, medulla. 



than those of the head ; a figure of a transverse section of the hair of 

 the beard of a white man is given at Fig. 130 ; in shape it is iden- 

 tical with a hair from the head of the same person (Fig. 123) ; the 

 letters refer to the same tissues. All the foregoing specimens of 

 hair were examined, and drawings simultaneously made, under a 

 l-4th object glass. 



441. In the Negro, or mulatto even, the imbrications are much 

 more distinct (because larger) than in the white races of mankind, 

 owing to the fact that the epidermic scales, which enter into the com- 

 position of the cuticular covering, are themselves deeply colored with 

 pigment, as already described in connection with the epidermis of 

 the skin, and the darker the skin the darker and coarser the epider- 

 mic scales. Beyond this fact, there is nothing to distinguish the 

 hair of a Negro, from that of any other specimen of the human 

 family. As a rule, whether in a white man or a black, strong, coarse 

 hair has a great disposition to curl. 



LESSON XXVII. 



HAIR, CONTINUED. 



442. As a class of Microscopical objects, and as a valuable ad- 

 junct to Zoology, the structure of the hair of animals has excited 



