very other part of the body corporation, as essentially
blood-circulating chemical substances, have been discovered the real
governors and arbiters of instincts and dispositions, emotions and
reactions, characters and temperaments, good and bad. A huge complex
of evidence, as various, complicated and obscure as human nature
itself, supports that fundamental law.

The chemistry of the soul! Magnificent phrase! It's a long, long way
to that goal. The exact formula is as yet far beyond our reach. But we
have started upon the long journey and we shall get there. Then will
Man truly become the experimental animal of the future, experimenting
not only with the external conditions of his life, but with the
constituents of his very nature and soul. The chemical conditions of
his being, including the internal secretions, are the steps of the
ladder by which he will climb to those dizzy heights where he will
stretch out his hands and find himself a God. Modern knowledge of
these chemical substances, circulating in the blood, and affecting
every cell of the body, dates back scarce half a century. But already
the paths blazed by the pioneers have led to the exploration of great
countries. The thyroid gland, the pituitary gland, the adrenal glands,
the thymus, the pineal, the sex glands, have yielded secrets. And
certain great postulates have been established. The life of every
individual, normal or abnormal, his physical appearance, and his
psychic traits, are dominated largely by his internal secretions. All
normal as well as abnormal individuals are classifiable according to
the internal secretions which rule in their make-up. Individuals,
families, nations and races show definite internal secretion traits,
which stamp them with the quality of difference. The internal
secretion formula of an individual may, in the future, constitute his
measurement which will place him accurately in the social system.

"More and more we are forced to realize that the general form and
external appearance of the human body depends, to a large extent,
upon the functioning, during the early developmental period, of the
endocrine glands. Our stature, the kinds of faces we have, the
length of our arms and legs, the shape of the pelvis, the color and
consistency of the integument, the quantity and regional location
of our subcutaneous fat, the amount and distribution of hair on our
bodies, the tonicity of our muscles, the sound of the voice, and
the s