d the adrenals, as well as the gonads.
Longevity is perhaps largely a matter of preventing, or postponing
their wane. Beside, there is the prophylaxis of bacterial infections,
and their all embracing corrosions--which, too, have an endocrine
aspect.

Persistence of youth or juvenility may be manufactured by nature in
two ways. There may be a persistence of early glandular predominances.
We have seen what happens to the thymocentric. That a pineal-centered
juvenile or infantile type exists may be safely predicted. Nature's
only other mode of securing perpetual youth seems to be by prolonging
the time allotted to the sex gland crescendo.

As for the golden age of maturity itself, what humdrum people and
poets have despised as middle age, the margin of reserve of the ruling
hormone is a quantity almost malleable in our hands, but still to be
regarded with respect as a hard cold proposition by the physiologist.
In general, the continuance of any stage of development means the
maintaining of the glandular administration peculiar to it. So the
chubby debonair irresponsible whom nothing can touch is happy in the
possession of a pineal uncorrupted by the years, while the genius who
can turn out his best work at sixty-five must thank his pituitary for
standing by him to the end.

THE SCIENCE OF PUERICULTURE

There is a specialty now growing in the womb of science which in its
own good time will come to fruition as the study of the child's needs
or puericulture. Even today there exists a scientific basis for the
formulation of the principles upon which every child should be brought
up. Though we have had marvelous results from the campaigns to lower
infantile mortality, most of what has been done has been medical in
its interest, and so largely negative in its accomplishments. The
removal of the causes of evil no doubt gives the good its opportunity.
But how to raise a child, endowed with satisfactory ancestral stuff,
as a Grade A normal or supernormal, still remains to be erected into
an exact science.

A number of attempts have been abortive in this field. Why they have
failed to arouse the ardor of the parent has puzzled some of the
pioneers. Child-culture as the foundation of all systems of education
has continued more or less of a hope rather than an achievement
because of a lack of appreciation of the different constitutional
varieties of children. A certain amount of attention has been lavished
upon children needing