ss who deny the very existence
of consciousness. These heretics of course pooh-pooh absolutely the
lions of metaphysics. On the other hand, it may be pointed out to our
mechanists who believe in mechanism to the bitter end, that even if
man can be described entirely as a mere transformer of energy, there
is no reason why he cannot also be described as a transformer of
energy plus someone who makes use of the transformer and of the
energy transformed. The stone wall before the honest mechanist is the
abolition of purpose, and design, an old insoluble problem upon
his premises. Preach, until you are blue in the face, behaviorist
tropisms, in which man is pushed and pulled about in his environment
as are iron filings in a magnetic field. Think up objective
physiologies in which your life and mine become a series of
concatenated influences and compound reflexes. Play with words like
the concentration reflex when you mean idea, and the symbolic reflex
when you mean language. But your most rigid nomenclature will never
abolish the mystic personal purpose in the equation, no matter how low
the step in the animal series to which you descend. The declaration
that a man is dominated by certain glands within his body should not
be taken to give aid and comfort to those who would banish mind from
the universe.

CHAPTER I

HOW THE GLANDS OF INTERNAL SECRETION WERE DISCOVERED

Just what are the glands of internal secretion? And how have we become
possessed of whatever information about them we have? A brief review
of how the idea of a gland of internal secretion came into the human
mind and of the contributions that have converged into a single body
of knowledge is worth while.

A gland is a collection of cells (those viscous globules which are the
units of all tissues and organs). It manufactures substances intended
for a particular effect upon the body economy. The effect may be
either local or upon the body as a whole.

Originally, a gland meant something in the body which was seen to make
something else, generally a juice or a liquid mixture of some sort.
A classical example is the salivary glands elaborating saliva. The
microscope has shown us that every gland is a chemical factory in
which the cells are the workers. The product of the gland work is its
secretion. Thus the sweat glands of the skin secrete the perspiration
as their secretion, the lachrymal glands of the eyes the tears as
theirs. The collectivism of