erve cells and fibres that are the centers of emotional
control and co-ordination.

The ante-pituitary has been depicted as the gland of intellectuality
(to use that term for lack of better). By intellectuality we mean
the capacity of the mind to control its environment by concepts and
abstract ideas. The frontal lobes of the brain are the central offices
for higher thought. Their cells are the most complex, have the most
numerous branches and association fibres. They store the fruits of
abstract thinking, mathematics, for example. The anterior pituitary is
in the closest relation and contact with them. Its secretion is tonic
to them. Now the instinct that is the forerunner of intellectuality
is the instinct of curiosity, with its emotion of wonder, and its
expression in the various constructive and acquisitive tendencies.
Studies of intellectual men, and of those with a keen instinct of
curiosity and a constructive-acquisitive trend prove them to be
ante-pituitary dominant in their make-up. The administration of
ante-pituitary extract to some defectives increases intellectual
activity and self-control. The future of intelligence may expect
a great deal from the newer chemistry of the secretions of the
ante-pituitary.

Two most important instincts, therefore, which in the complexity of
their sublimations have created most of the institutions of society,
the maternal and the intellectual, are connected directly with a
proper function of the pituitary endocrines. So it happens that
disturbances of these instincts, reaching far into the normal and
intellectual spheres of the mind, are definitely connected with
disturbances of the pituitary. As we shall note in reviewing the
essentials of the pituitary-centered or pituito-centric personality,
the personality governed by the fluctuations of activity within the
pituitary, people with injured, diseased or mechanically limited
pituitaries (because of the smallness of the bony case enclosing them)
exhibit defects and perversions of conduct and intelligence directly
attributable to affections of the very instincts and functions
the pituitary governs. Children with small, mechanically cramped
pituitaries lie and steal, are bed-wetters, have poor control over
themselves, and a low learning capacity.

THE THYROID AND INSTINCT

The chemical mechanism of the instincts described: sex libido, passion
and jealousy in relation to the ovaries and testes, fear and anger in
relation to