as the holders of the secrets of our inmost being. They are the well
springs of life, the dynamos of the organism. In trailing their scent
we appear to be upon the track not only of the chemistry of our
bodies, but of the chemistry of our very souls. An increasing host of
factors and studies marshal themselves solidly for that declaration.
Endeavor to conceive the consequences and possibilities for the
future. A synthesis of the known in the field provides even now a
means of understanding and control of the perplexities of human nature
and life that are like a vista seen from a mountain top after the
lifting of a fog.

The most precious bit of knowledge we possess today about Man is that
he is the creature of his glands of internal secretion. That is, Man
as a distinctive organism is the product, the by-product, of a number
of cell factories which control the parts of his make-up. Much as the
different divisions of an automobile concern produce the different
parts of a car. These chemical factories consist of cells, manufacture
special substances, which act upon the other cells of the body and so
start and determine the countless processes we call Life. Life, body
and soul emerge from the activities of the magic ooze of their silent
chemistry precisely as a tree of tin crystals arises from the chemical
reactions started in a solution of tin salts by an electric current.

Man is regulated by his Glands of Internal Secretion. At the beginning
of the third decade of the twentieth century, after he had struggled,
for we know at least fifty thousand years, to define and know himself,
that summary may be accepted as the truth about himself. It is
a far-reaching induction, but a valid induction, supported by a
multitude of detailed facts.