internal secretions, measured by the maximum obtainable in a given
situation. These inherent factors explain, too, why children born
and bred in virtually the same environment show the most extreme
differences in educability. That the differences are inherited was
made evident by Galton's finding that the chance of the son of an
eminent man exhibiting eminent ability was 500 times as great as that
of the son of a man taken at random.

Every baby, then, is born with a combination of nerve cells and
ductless glands which determine its capacity for mental development,
that might never be realized, but could never be exceeded. If, in any
family, minor differences in educability are observed, they can be
put down to disturbance of these two factors occurring after the
fertilized germ cell had started to divide and reproduce itself. But
any marked falling off in either the nervous or endocrine factors has
to be considered pathologic, due to an impairment of them by adverse
environment.

Recent studies have amply established that the proportion of
certifiable mental defectives, and of a much larger class, the
subnormal but not certifiable class, is progressing by leaps and
bounds. It is perhaps the most absurd frailty of our present system
of education that it takes almost no account of innate differences in
educability. To spend money upon the teaching of these children along
lines where they are unteachable is not only waste pure and simple,
but crime, for it deprives the educables of their just due.

These, of course, are the crude and simple lines upon which the finer
and more complex evolution of the endocrine problems of the school
child will build. The fine art of education itself is crude and gross
and simple compared with what it might be, even as a beginning. The
science of education has yet to begin, as the offspring of that
science of the future, to which knowledge of the internal secretions
will contribute no little, the science of puericulture.

VOCATIONAL EDUCATION

It is difficult, indeed, to avoid becoming merely enthusiastic upon
the possibilities of the applications of the endocrines to the
educational domain. Happiness for the average individual consists of
a double success--success in his vocation (chosen or forced upon him)
and success in his sex life. A certain hue and cry has been raised in
the last few years concerning the vast and overwhelming importance of
sex in the happiness and even in the