l so well shows,
secretions which, when directly interacting, are mutually reinforcing,
when affecting nerves, may become clashing opponents.

The Kinetic Chain is about as good a case as there is of the glands of
internal secretion co-operating. The Check and Drive systems, with the
adrenals and thyroid opposed, are one of the best instances of their
antagonisms. Besides, there are a number of other relationships
between them that might be cited. They all bear with more or less
pressure, positive or negative, upon the sex glands which will be
considered in its place. If one wished to consider all the glands in
their pro and anti relations, a separate volume would be required.

THE VEGETATIVE APPARATUS

The combination of the internal secretions and the vegetative system
has been spoken of as the vegetative or autonomic apparatus. The
vegetative apparatus is the oldest part of the nervous system.
And some acquaintance with its constitution is necessary to any
understanding of the possibilities of control of human nature.

For modern thought does not regard the brain as the organ of mind at
all, but as one unit of a complex synthesis, of which mind is the
product, and the vegetative apparatus is the major component. That
involves the blasting of the last current superstition of the
traditional psychology, the dogma that the brain is the exclusive seat
of mind.

That an animal is a vast concourse of cells is one of the accepted
fundamentals of biology. What is not so generally taken into
consideration is that the assemblage is formed by the agglutinations
of millions of years, and that it is hence composed of parts of
different ages and pedigrees, some exceedingly ancient and hoary, some
middle-aged, and some relatively new and recent. In the invertebrates,
who date further back in the history of the planet than any
vertebrate, the nervous system consists of discrete patches of nerve
cells, the ganglions composing the ganglionic system of which the
vegetative or autonomic nervous system of man is the direct descendant
and representative. The brain and central nervous system are
definitely later acquisitions, imposed upon the original stratum of
the check and drive machine.

The primitive chassis of the mechanism, so to speak, is the so-called
vegetative nervous system. Grouped with that system are the primeval
breathing, feeding and reproducing inventions, the viscera boxed up
in the chest and abdomen. The third p