nce exists that fertility occurs.
The vitality of the children then is subnormal and the mortality
rate high. The eunuchoid tendency is transmitted. Variations and
transitions of every kind are found among the undersexed eunuchoid
personalities, depending upon the quality and degree of the secretions
lacking.

When there is an excess of these sex secretions, a turbulent,
tempestuous, sexually sensitive temperament, that may go on to
satyriasis or nymphomania, is created. It has been shown that doves
can be rendered overfeminine in their behaviour and characteristics
by injections of ovarian material. Oversexed types of personality
therefore may exist as well as undersexed.

COMBINATIONS AND PERMUTATIONS

The types of personality sketched--the thyrocentric, the
pituitocentric, the adrenocentric, the thymocentric, the
gonadocentric--are really prototypes, the great kingdoms of
personality, to which individuals can be assigned, by hall marks which
facilitate their classification. They may also be described as the
pure endocrine types, which include a minority of a population. But
the majority consist of dominant mixtures, hyphenates, groups which
are the species and varieties of the greater classes. Combinations and
variations of control among the adrenals and thyroid, pituitary or
thymus, and so on, occur, with effects that are sometimes additive,
reinforcing a particular trait of the person, and at others
conflicting, and neutralizing. Quantitative variations of the same
secretion may occur periodically in the same individual, which
explains the multiplicity and complexity, the inconsistency and
contradictions of conduct in a man or woman at the different episodes
and crises of life, to a certain extent.

There should be a stable balance between the various endocrines, the
stability expressing itself in what we are pleased to call the normal.
There should also be a balance between the antagonistic elements in
the same gland; for instance, the pituitary. The pituitary, built
of two distinct portions, the anterior and the posterior, is in
equilibrium when the two are nicely adjusted. But the accidents and
vicissitudes of life (pregnancy for example) will upset the balance.
And so there will result changes of physique, conduct and character.
Like possibilities apply to all the other glands of internal
secretion. In our ability to exercise a control over these
disturbances of balance, to be developed in the future, lie