y suffer from any
of the common diseases of children--if at all, from measles. Op the
other hand, those who have every infection of the period, and who, as
their mothers say, seem to get everything, are those whose system
is thyroid poor. Thyroid poverty is a splendid enticement to the
universal microbe. The thymocentric stands all diseases poorly. The
pituitary type is more liable to epidemic meningitis and infantile
paralysis, typhoid and scarlet fever.

The public health officer of the future will be armed with a new
weapon in his fight against the spread of an epidemic. He will be able
to classify the endocrine traits of the population exposed, and to
advise a course of glandular feeding for the types specially liable.
The Schick test for diphtheria susceptibility is an illustration
of one method of approach to the problem of the epidemiologist in
settling who needs protection. The endocrines will assist him in the
great body of diseases for which no immunity test is at hand. Should
another influenza epidemic come along, for instance, the proper
handling, from the endocrine standpoint, of the thymocentrics and
the related adrenocentrics would help considerably in lowering the
mortality.

Endocrine types have other tendencies, which when studied and
controlled, will decimate the great assassins of middle age: heart
disease and kidney disease, with accompanying degenerations of the
blood vessels and circulation. The adrenocentric tends to get up a
hyperacidity of the stomach and a high blood pressure, besides certain
forms of diseases of the lungs. The thyrocentric is predisposed to
heart disease, as well as intestinal disturbances. The pituitocentric
is liable to periodic and cyclic upsets in his health.

Narcotism, the craving for narcotic or stimulant drugs, and its
subvariety, alcoholism, has been found most often among the
thymocentrics. Any type of endocrine inferiority, interfering with
success in life, may lead to the habit of drug addiction as one way
out. But the blood and tissues of the thymocentric appear to become
habituated to the narcotic stimulant more easily than the other types,
and so to demand it with a physical imperative comparable to the food
or sex urge. Among artists, philosophers and statesmen, on the other
hand, actively productive and so contrasted with criminals and
degenerates drug addiction has frequently been a mode of endocrine
compensation. That is, the drug produced temporarily t