effects, the result of reading alarmist quack pamphlets.

In another case known to me, a young man leading a chaste life,
experienced crises of sexual excitement every ten to fourteen
days, the crisis lasting for several days.

Finally, an interesting contribution to this subject, suggested
by this _Study_, has been made and published (in the proceedings
of the Amsterdam International Congress of Psychology, in 1907)
by the well-known Amsterdam neurologist and psychologist, Dr.
L.S.A.M. Von Roemer under the title, "Ueber das Verhaeltniss
zwischen Mondalter und Sexualitaet." Von Roemer's data are made up
not of nocturnal involuntary emissions, but of the voluntary acts
of sexual intercourse of an unmarried man, during a period of
four years. Von Roemer believes that these, to a much greater
extent than those of a married man, would be liable to periodic
influence, if such exist. On making a curve of exact lunar length
(similarly to Perry-Coste), he finds that there are, every month,
two maxima and two minima, in a way that approximately resemble
Perry-Coste's curve. The main point in Von Roemer's results is,
however, the correspondence that he finds with the actual lunar
phases; the chief maximum occurs at the time of the full moon,
and the secondary maximum at the time of the new moon, the minima
being at the first and fourth quarters. He hazards no theory in
explanation of this coincidence, but insists on the need for
further observations. It will be seen that A.N.'s results (_ante_
p. 117) seem in the main to correspond to Von Roemer's.

FOOTNOTES:

[117] Even counting the pulse is a comparatively recent method of
physiological examination. It was not until 1450 that Nicolas of Cusa
advocated counting the pulse-beats. (Binz, _Deutsche medizinische
Wochenschrift_, October 6, 1898.)

[118] I leave this statement as it stands, though since the first
publication of this book it has ceased to be strictly accurate.

[119] Sanctorius, _Medicina Statica_, Sect. I, aph. lxv.

[120] _American Journal of Obstetrics_, xiv, 1882.

[121] _Zooenomia_, Section XXXVI.

[122] I reproduced these notes in full in earlier editions of this volume.

[123] Moll refers to the case of a man whose erotic dreams occurred every
fortnight, and always on Friday night (_Libido Sexualis_, Band I, p. 136).
One is inclined to suspect an el