used by them, within limits. Research here has its opportunity.

THE IMPROVEMENT OF RACIAL STOCK

A vast new territory of inquiry and achievement, as yet totally
unexplored, is opened by the endocrines to the eugenists, and those
idealists whose most earnest aspiration is the improvement of racial
stock as a necessary preliminary to improvement of racial life.
Beginning with Galton, they have brought to light a great collection
of data to prove that human traits and faculties, good and bad, are
inherited. Ability has been shown to run in certain families and
degeneracy in others. Yet all of the practical net result has been
summed up in the term "negative eugenics," the eugenics of prohibition
and warning.

Now the concept of personality, as woven around a system of chemical
reflexes, handed on from generation to generation, is bound to change
all that, and to create a structure of positive eugenics. It has been
said that what radium is to chemistry, the internal secretions are to
physiology. Just as radium enlightens the chemist about the history of
matter, and the integrations and disintegrations constituting the life
of an element--the internal secretions illuminate the history of the
individual as part of the life of the race, and of its integrations
and disintegrations. Seeing the individual as a system of chemical
substances interacting will assist enormously to predict the nature,
character and constitution of his descendants, which is essentially
what the eugenist is after.

The study of matings, the heart of the matter, will concern itself
with the investigation and comparison of the kind of endocrine
personalities that mate, the internal secretion predominances that
cross, and the consequent endocrine personality of the offspring.
Data bearing upon physique and physiognomy, details of anatomy and
function, mind and behaviour will so be co-ordinated as no eugenist
has hitherto succeeded in doing. Laws of endocrine inheritance will
emerge that will bring the control of heredity within measurable
distance. Standards and norms of a new kind would be obtained.

A beginning of this study of endocrine inheritance, on the pathologic
side, has been made. Some of these have been along Mendelian lines.
Following up abnormal growth (making giants and dwarfs) and abnormal
metabolism (goitre, diabetes, and so on), it has been stated that it
would seem that abnormal growth is dominant in the male, and recessive
in the