future in which a true science of mind and character will appear.

Certain of the glands of the body are described as glands of
internal secretions in that the products of their activity, their
secretions, are poured into the blood stream rather than on the
surface of the body or into the digestive tract. The most
prominent of these glands, all of which are very small and
extraordinarily active, are as follows:

The Pituitary Body (Hypophysis)--a tiny structure which is
situated at the base of the brain but is not a part of that
organ.

The Pineal Body (Epiphysis)--a still smaller structure, located
within the brain substance, having, however, no relationship to
the brain. This gland has only lately acquired a significance.
Descartes thought it the seat of the soul because it is situated
in the middle of the brain.

The Thyroid gland, a somewhat larger body, situated in the front
of the neck, just beneath the larynx. We shall deal with this in
some detail later on.

The Parathyroids, minute organs, four in number, just behind the
thyroid.

The Thymus, a gland placed just within the thorax, which reaches
its maximum size at birth and then gradually recedes until at
twenty it has almost disappeared.