n of
this book was published show well-marked annual curves, though
each curve always has some slight personal peculiarities of its
own. The most interesting and significant is that of E.M. (see
_ante_ p. 116), covering four years. It is indicated by the
following monthly frequencies, summated for the four years:--

Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec.
16 13 14 22 19 19 12 12 14 14 12 24

E.M. lives in India. April, May, and June, are hot months, but
not unhealthy, and during this season, moreover, he lives in the
hills, under favorable conditions, getting plenty of outdoor
exercise. July, August, and September, are nearly as hot, but
much damper, and more trying; during these months, E.M. is living
in the city, and his work is then, also, more exacting than at
other times, September is the worst month of all; he has a short
holiday at the end of it. During December, January, and February,
the climate is very fine, and E.M.'s work is easier. It will be
seen that his ecbolic curve corresponds to his circumstances and
environment, although until he analyzed the record he had no idea
that any such relationship existed. Unfavorable climatic
conditions and hard work, favorable conditions and lighter work,
happen to coincide in his life, and the former depress the
frequency of seminal emissions; the latter increase their
frequency. At the same time, the curve is not out of harmony with
the northern curves. There is what corresponds to a late spring
(April) climax, and another still higher, late autumn (December)
climax. A very interesting point is the general resemblance of
the ecbolic curves to the Indian conception-curves as set forth
by Hill (_ante_ p. 140). The conception-curve is at its lowest
point in September, and at its highest point in December-January,
and this ecbolic curve follows it, except that both the minimum
and the maximum are reached a little earlier. When compared with
the English annual ecbolic curves (W.K. and Perry-Coste), both
spring and autumn maxima fall rather later, but all agree in
representing the autumn rise as the chief climax.

The annual curve of A.N. (_ante_ p. 117), who lives in Indiana,
U.S.A., also covers four years. It presents the usual spring
(May-June, in this case) and autumn (Sep