128 THE GLANDS REGULATING PERSONALITY 



who suffered from a tumor of the pineal, and discussed immor- 

 tality with his physicians. It is probable that these thymus 

 and pineal effects are indirect through their action upon the sex 

 glands. For in the types with persistent juvenile thymus there 

 occurs a maldevelopment of the sex glands, while in those with 

 early pineal recession the sex glands bloom simultanously with 

 the appearance of adolescent hair and mental traits. The hasten- 

 ing of sexual hair by tumors of the adrenal gland may also be 

 put down to a release from restraint of the interstitial sex cells. 



There are certain spheres in the hair geography of the body, 

 over which particular glands may be said to rule or to possess 

 a mandate. The hair of the head seems to be primarily under 

 the control of the thyroid. Thus in cretins reconstructed by thy- 

 roid feeding, the straight, rather animal hair becomes lustrous 

 and fine, silken and curly. In the thyroid deficiency of adults, 

 a prominent phenomenon often is the falling out of the hair in 

 handfuls. Baldness is frequently associated with a progressive 

 decrease of the concentration of thyroid in the blood. At the 

 same time, there tends to be a thinning of the eyebrows, especially 

 of the outer third. 



The hair of the face in males, and the other terminal hairs in 

 both males and females, is regulated by the sex glands primarily. 

 In the female, the ovary, that is to say, the interstitial cells of 

 the ovary, inhibit the growth of hair upon the face. In destruc- 

 tive disease of the ovaries, as well as in other affections of it, 

 hair in the form of moustache, beard and whiskers may appear in 

 female. That is why in women after the grand sex change of 

 life, the menopause, hair often grows in the typically male regions 

 because of loss of the inhibiting influence of the ovarian internal 

 secretion upon them. After castration of the ovaries, the same 

 may result. Removal of the male sex glands, or disturbances of 

 them, will interfere with the proper development of the normal 

 facial hair. Of the hair of the chest, the abdomen and the back, 

 the adrenals seem to be the controllers. Adrenal types have 

 hairy chests in males, and hair on the back in females. They have 

 also a good deal of hair upon the abdomen. The hair on the 

 extremities varies a good deal with the pituitary. People with 

 hair upon hands, arms and legs, alone, are generally pituitary, or 

 have a striking pituitary streak in their make-up. 



When the adrenals increase in size in childhood, a remarkable 

 triad follows — general hairiness, adiposity and sexual precocity. 

 One fact should be noted. When the adrenals evoke precocity 



