considers that it is certainly incorrect to assert
that the menstrual process is arrested during pregnancy, and he
refers to the frequency of monthly epistaxis and other nasal
symptoms throughout this period (W. Fliess, _Beziehungen zwischen
Nase und Geschlechts-Organen_, pp. 44 et seq.). Beard, who
attaches importance to the persistence of a cyclical period in
gestation, calls it the muffled striking of the clock. Harry
Campbell (_Causation of Disease_, p. 54) has found
post-climacteric menstrual rhythm in a fair sprinkling of cases
up to the age of sixty.

It is somewhat remarkable that, so far as I have observed, none of these
authors refer to the possibility of any heightening of the sexual appetite
at the monthly crisis which they believe to exist in men. This omission
indicates that, as is suggested by the absence of definite statements on
the matter of increase of sexual desire at menstruation, it was an ignored
or unknown fact. Of recent years, however, many writers, especially
alienists, have stated their conviction that sexual desire in men tends to
be heightened at approximately monthly intervals, though they have not
always been able to give definite evidence in support of their statements.

Clouston, for instance, has frequently asserted this monthly
periodic sexual heightening in men. In the article,
"Developmental Insanity," in Tuke's _Psychological Dictionary_,
he refers to the periodic physiological heightening of the
reproductive _nisus_; and, again, in an article on "Alternation,
Periodicity, and Relapse in Mental Diseases" (_Edinburgh Medical
Journal_, July, 1882), he records the case of "an insane
gentleman, aged 49, who, for the past twenty-six years, has been
subject to the most regularly occurring brain-exaltation every
four weeks, almost to a day. It sometimes passes off without
becoming acutely maniacal, or even showing itself in outward
acts; at other times it becomes so, and lasts for periods of from
one to four weeks. It is always preceded by an uncomfortable
feeling in the head, and pain in the back, mental hebetude, and
slight depression. The _nisus generativus_ is greatly increased,
and he says that, if in that condition, he has full and free
seminal emissions during sleep, the excitement passes off; if
not, it goes on. A full dose of bromide or iodide of potassium
often, but