induced during the half waking state, culminating in an orgasm in
which the power of preventing discharge has been artificially
acquired. The subject, E.M., was 32 years of age when the record
began. He belongs to a healthy family, and is himself physically
sound, 5 feet 6 inches in height, but weight low, due to rickets
in infancy. In early life he stammered badly; his temperament is
emotional and self-conscious, while his work is unusually
exacting, and he lives for most of the year in a very trying
climate. As a boy he was very religious, and has always felt
obliged to resist sexual vice to the utmost, though there have
been occasional lapses.

As regards lunar periodicity, E.M., has summated his results in a
curve, after the same manner as Mr. Perry-Coste, beginning with
the new moon. The periods covered include 54 lunar months, and
the total number of discharges is 176; the average frequency is
about 3 per month of twenty-eight days. The curve, for the most
part, zigzags between a frequency of 4 and 9, but on the
twenty-fourth day it falls to 1, and then rises uninterruptedly
to a height of 11 on the twenty-seventh day, falling to 2 on the
next day. Whether a really menstrual rhythm is thus indicated I
do not undertake to decide, but I am inclined to agree with E.M.
himself that there is no definite evidence of it. "It looks to
me," he writes, "as if the only real rhythm (putting aside the
annual cycle) will be found to be the average period between the
ecboles, varying in different persons, but in my case, about nine
and one-eighth days. May not the ecbolic period in men be
compared to the menstrual period in women, and be an example of
the greater katabolic activity of men? There is the period of
tumescence, and the ecbole constituting the detumescence. The
week-end holiday would hasten the detumescence, but about every
third week-end there would tend to be delay to enable the system
to get back into its regulation nine or ten days' stride. This
might possibly be the explanation of the curves. The recent
emissions were nearly all involuntary during sleep. Age may have
something to do with the change in character."

E.M.'s curves frequently show the influence of weekly
periodicity, in the tendency to ecbole on Sunday, or sometimes on
Saturday or Monday. In recent ye