tion,
conduct and character. The orderliness of human life, in the
sequential march of its episodes, crises, successes and failures,
depends, to a large extent, upon their interactions with each other
and with the environment.

2. One or several of the glands possesses a controlling or superior
influence above that of the others in the physiology of the individual
and so becomes the central gland of his life, its dominant, indeed, so
far as it casts a deciding vote or veto, in its everyday existence and
incidents as well as in its high points, the climaxes and emergencies.

3. These glandular preponderances are at the basis of personality,
creating genius and dullard, weakling and giant, Cavalier and Puritan.
All human traits may be analyzed in terms of them because they are
expressions of them.

4. Specific types of personality may be directly associated with
particular glandular prominences, so that we have the thyroid-centered
types, the pituitary-centered types, the adrenal-centered types, etc.
These are the classic Three, the prototypes in their purity most
easily described and recognized.

5. Combinations of these, as well as of other glands--with joint
predominance--occur and indeed form the majority of populations. The
phenomena of varieties in species are thus explained.

6. Internal secretion traits are inherited, and variations in heredity
are essentially the structural representation of the resultant of a
parallelogram of forces exerted by each of the parental prepotent
glands. If they are of the same type, they may reinforce each other:
if not, inhibitions and compensations will come into play. Mendelian
laws may apply.

7. The process of evolution, as the play of natural selection upon
these variations, becomes comprehensible from a new standpoint.

8. Certain diseases, and disease tendencies, both acute and
constitutional, as well as traits of temperament and character, and
predetermined reactions to certain recurring situations in life,
are rooted in the glandular soils that compose the stuff of the
individual.

9. The subconscious, of which the vegetative apparatus is the physical
basis, leads back to the internal secretions for the profoundest
springs of its secrets. We shall see how and why.

10. Given the internal secretory composition, so to speak, of an
individual--his endocrine formula--and so his intravisceral pressures,
one may predict, within limits, his physical and psychic make-up