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GENERAL PREFACE
THE EVOLUTION OF MODESTY-1.1
THE EVOLUTION OF MODESTY-1.2
THE EVOLUTION OF MODESTY-1.3
THE EVOLUTION OF MODESTY-1.4
THE EVOLUTION OF MODESTY-1.5
THE EVOLUTION OF MODESTY-1.6
THE EVOLUTION OF MODESTY-2.1
THE EVOLUTION OF MODESTY-2.2
THE EVOLUTION OF MODESTY-2.3
THE EVOLUTION OF MODESTY-2.4
THE EVOLUTION OF MODESTY-2.5
THE EVOLUTION OF MODESTY-3
THE EVOLUTION OF MODESTY-4
THE PHENOMENA OF SEXUAL PERIODICITY-1.1
THE PHENOMENA OF SEXUAL PERIODICITY-1.2
FOOTNOTES
THE PHENOMENA OF SEXUAL PERIODICITY-2.1
THE PHENOMENA OF SEXUAL PERIODICITY-2.2
THE PHENOMENA OF SEXUAL PERIODICITY-2.3
THE PHENOMENA OF SEXUAL PERIODICITY-3.1
THE PHENOMENA OF SEXUAL PERIODICITY-3.2
THE PHENOMENA OF SEXUAL PERIODICITY-3.3
THE PHENOMENA OF SEXUAL PERIODICITY-3.4
THE PHENOMENA OF SEXUAL PERIODICITY-3.5
FOOTNOTES
AUTO-EROTISM: A STUDY OF THE SPONTANEOUS MANIFESTATIONS OF THE SEXUAL IMPULSE-1.1
AUTO-EROTISM: A STUDY OF THE SPONTANEOUS MANIFESTATIONS OF THE SEXUAL IMPULSE-1.2
AUTO-EROTISM: A STUDY OF THE SPONTANEOUS MANIFESTATIONS OF THE SEXUAL IMPULSE-1.3
AUTO-EROTISM: A STUDY OF THE SPONTANEOUS MANIFESTATIONS OF THE SEXUAL IMPULSE-1.4
AUTO-EROTISM: A STUDY OF THE SPONTANEOUS MANIFESTATIONS OF THE SEXUAL IMPULSE-1.5
AUTO-EROTISM: A STUDY OF THE SPONTANEOUS MANIFESTATIONS OF THE SEXUAL IMPULSE-1.6
FOOTNOTES
AUTO-EROTISM: A STUDY OF THE SPONTANEOUS MANIFESTATIONS OF THE SEXUAL IMPULSE-2.1
AUTO-EROTISM: A STUDY OF THE SPONTANEOUS MANIFESTATIONS OF THE SEXUAL IMPULSE-2.2
AUTO-EROTISM: A STUDY OF THE SPONTANEOUS MANIFESTATIONS OF THE SEXUAL IMPULSE-2.3
AUTO-EROTISM: A STUDY OF THE SPONTANEOUS MANIFESTATIONS OF THE SEXUAL IMPULSE-2.4
AUTO-EROTISM: A STUDY OF THE SPONTANEOUS MANIFESTATIONS OF THE SEXUAL IMPULSE-3.1
AUTO-EROTISM: A STUDY OF THE SPONTANEOUS MANIFESTATIONS OF THE SEXUAL IMPULSE-3.2
AUTO-EROTISM: A STUDY OF THE SPONTANEOUS MANIFESTATIONS OF THE SEXUAL IMPULSE-3.3
AUTO-EROTISM: A STUDY OF THE SPONTANEOUS MANIFESTATIONS OF THE SEXUAL IMPULSE-3.4
AUTO-EROTISM: A STUDY OF THE SPONTANEOUS MANIFESTATIONS OF THE SEXUAL IMPULSE-3.5
AUTO-EROTISM: A STUDY OF THE SPONTANEOUS MANIFESTATIONS OF THE SEXUAL IMPULSE-3.6
AUTO-EROTISM: A STUDY OF THE SPONTANEOUS MANIFESTATIONS OF THE SEXUAL IMPULSE-3.7
FOOTNOTES
APPENDIX A-1.1
APPENDIX A-1.2
APPENDIX B-1.1
APPENDIX B-1.2
APPENDIX C-1.1
APPENDIX C-1.2
INDEX OF AUTHORS

attacks about ten days after the major attacks. It is noteworthy that the 

subject showed a tendency to periodicity when in health, and once remarked 

laughingly before his illness: "I am just like a woman, always most 

excitable at a particular time of the month." 

 

Periodicity has been noted in various disorders of nervous 

character. Periodic insanity has long been known and studied 

(see, e.g., Pilcz, _Die periodischen Geistesstoerungen_, 1901); it 

is much commoner in women than in men. Periodicity has been 

observed in stammering (a six-weekly period in one case), and 

notably in hemicrania or migraine, by Harry Campbell, Osler, etc. 

(The periodicity of a case of hemicrania has been studied in 

detail by D. Fraser Harris, _Edinburgh Medical Journal_, July, 

1902.) But the cycle in these cases is not always, or even 

usually, of a menstrual type. 

 

It is now possible to turn to an investigation which, although of very 

limited extent, serves to place the question of a male menstrual cycle for 

the first time on a sound basis. If there is such a cycle analogous to 

menstruation in women, it must be a recurring period of nervous erethism, 

and it must be demonstrably accompanied by greater sexual activity. In the 

_American Journal of Psychology_ for 1888, Mr. Julius Nelson, afterward 

Professor of Biology at the Rutgers College of Agriculture, New Brunswick, 

published a study of dreams in which he recorded the results of detailed 

observations of his dreams, and also of seminal emissions during sleep (by 

him termed "gonekbole" or "ecbole"), during a period of something over two 

years. Mr. Nelson found that both dreams and ecboles fell into a 

physiological cycle of 28 days. The climax of maximum dreaming (as 

determined by the number of words in the dream record) and the climax of 

maximum ecbole fell at the same point of the cycle, the ecbolic climax 

being more distinctly marked than the dream climax. 

 

The question of cyclic physiological changes is considerably 

complicated by our uncertainty regarding the precise length of 

the cycle we may expect to find. Nelson finds a 28-day cycle 

satisfactory. Perry-Coste, as we shall see, accepts a strictly 

lunar cycle of 291/2 days. Fliess has argued that in both women and 

men, many physiological facts fall into a cycle of 23 days, which 

he calls male, the 28-day cycle being female. (W. Fliess, _Die 

Beziehungen zwischen Nase und weiblichen Geschlechts-Organen_, 

1897, pp. 113 et seq.) Although Fliess brings forward a number of 

minutely-observed cases, I cannot say that I am yet convinced of 

the reality of this 23-day cycle. It is somewhat curious, 

however, that at the same time as Fliess, though in apparent 

independence, and from a different point of view, another worker 

also suggested that there is a 23-day physiological cycle (John 

Beard, _The Span of Gestation and the Cause of Birth_, Jena, 

1897). Beard approaches the question from the embryological 

standpoint, and argues that there is what he terms an "ovulation 

unit" of about 231/2 days, in the interval from the end of one 

menstruation to the beginning of the next. Two "ovulation units" 

make up one "critical unit," and the length of pregnancy, 

according to Beard, is always a multiple of the "critical unit;" 

in man, the gestation period amounts to six critical units. These 


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