same sex,
erotopathia, sexual anaesthesia, etc., are to be explained, at least
in part, by reference to the results of these social inhibitions
trying to establish themselves.

The emotion of sex-love, so plainly traceable to the reproductive
instinct, has its evolution in each normal individual. It develops
through various stages as do other instincts. It does not make its
appearance for the first time at the period of adolescence, as has
been thought. Extended and varied experience in the public schools
has furnished me with very favorable opportunities for making
observations upon children who were allowed to mix freely regardless
of sex. Most of the observations were made in schools which, with
very few exceptions, had outdoor recesses during which the plays and
games brought both sexes together under no restraint other than the
ordinary social ones with perhaps some modifications by the
particular regimen of the school concerned. The observations relative
to the subject of love between the sexes were begun fifteen years
ago. The first observations were made incidentally and consisted
mainly of those love affairs between children, that needed my
attention as one officially concerned. However, many were
unquestionably innocent and harmless. My observations have not been
limited to children under school conditions. About one-third of the
number of cases which I have personally observed have been concerning
children who were under the ordinary social or industrial conditions.
During the past fifteen years, from time to time, I have collected as
many as eight hundred cases observed by myself. In addition to these
I have seventeen hundred cases as returns from a syllabus which I
circulated among the students in my pedagogy and psychology classes
at the Northern Indiana Normal School, at Valparaiso, Ind., in 1896.
The syllabus is as follows:

I. _Love between children of about the same age and of opposite sex._
Give as completely as you can the details of any such cases you know
of; age of each child; length of time the love continued; whether it
was mutual; what broke it up; any signs of jealousy; any
_expressions_ of love such as confessions, caresses, gifts, etc.; any
ideas of marriage; actions in presence of each other free or shy,
when alone, when in the presence of others; any tendency of either
child to withhold demonstrations and be satisfied to love at a
distance; any other details you may have noticed.

II.