may
find it necessary to purchase an entirely different size of hat, more
commodious clothes, and newly fitting gloves and shoes. At the same
time, his family, relatives and friends, discover that the erstwhile
generous, frank, neat and punctual and liked, has become stingy and
suspicious and slovenly and hated. And all because a gland has begun
to undersecrete or to oversecrete. The transformation will be slight
or marked, depending entirely upon the extent of impairment, positive
or negative, of the gland involved.

But it is not only in the shaping of the normal individual's
architecture that the internal secretions dominate. Over that subtle
something known in all languages as vitality, expressive of the
intensity of feeling, thought and reactions in cells, they rule
supreme. Gay vivacity and grim determination, the temperament of a
Louis XIV, and the soul of a Cromwell, are the crystallizations of
these chemical substances acting upon the brain.

INTERNAL SECRETION VARIETIES

There is no better way of illustrating the influence of the internal
secretions upon the normal than the analysis of the variation of
traits with variations in glandular predominances. The general build
of an individual, his skeletal type, the proportion between the size
of his arms and that of his legs, as well as that between his trunk
and his lower extremities, whether he is to be tall, lanky and
loutish, or short, squat and dumpy, are to be considered. Different
facial types are the expressions of underlying endocrine differences.
The head and skull offer a number of clues to the controlling
secretions in the blood and tissues. Whether the forehead is to be
broad or narrow, the distance between the eyes, the character of the
eyebrows, the shape and size and appearance of the eyes themselves,
the mould of the nose and jaws and the peculiarities of the teeth, are
all so determined. The skin, in its color, texture, the quantity
and distribution of its fatty and other constituents, eruptions and
weather reactions, is influenced. Also the mucous membranes, the
color and lustre and structure of the hair, as well as its general
distribution and development, are hieroglyphics of the endocrine
processes below the surface. Whether the muscles are massive or
sparse, atrophied or hypertrophied, soft or hard, easily fatigable
or not, bespeak conditions in the glandular chain. In short, we must
regard the individual as an immensely complicated patt