t 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 destructive
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, and an early
awakening of the secondary sex characteristics, it is a masculine
precocity, and an approximation to the masculine even in females.
There is a definite trend toward an increase of the male in the
individual's composition at the expense of the female. We shall have
to consider this in greater detail when we analyze the internal
secretion basis of masculinity and femininity. In general, the degree
of general hairiness is an index to the amount of adrenal influence
upon the organism. All the endocrines which affect the hair growth
also act upon the sebaceous glands which oil the skin.

THE EYES

Eyes present clues to internal secretion constitutions dependent upon
influences of architecture and function. The thyroid eye is typical.
It is large, brilliant and protruding. The individual is "pop-eyed."
On the other hand, subthyroidized eyes tend to be sunken and
lustreless. The eyes of a pituitary type are either set markedly
apart, or close toge