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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

intervals, he thinks, lengthened--at times, he thought, wholly 

disappeared. During 1899, while they did not recur often, when 

they did come the sensation was pronounced, although the 

emission was less common. There was a peculiar 'heavy' feeling 

about the testicles, and a marked tendency towards erection of 

the penis, especially at night-time (while sleeping). X. often 

awoke to find a tense erection. Moreover, these feelings usually 

continued a week. 

 

"1. In general, X. is of the opinion that as he grows older these 

intervals lengthen, though this inference is not based on 

_recorded_ data. 

 

"2. He notes that a discharge (through sexual intercourse or in 

sleep) invariably brings the peculiar feeling to a close for the 

time being. 

 

"3. He notes that sexual intercourse _at the time_ stops it; but, 

when there has been sexual intercourse within a week or ten days 

of the time (based upon the observations of 1893), that it had no 

tendency to check the feeling." 

 

In another case, that of F.C., an Irish farmer, born in 

Waterford, the data are still more meagre, though the periodicity 

is stated to be very pronounced. He is chaste, steady, with 

occasional lapses from strict sobriety, healthy and mentally 

normal, living a regular open-air life, far from the artificial 

stimuli of towns. The observations refer to a period when he was 

from 20 to 27 years of age. During this period, nocturnal 

emissions occurred at regular intervals of exactly a month. They 

were ushered in by fits of irritability and depression, and 

usually occurred in dreamless sleep. The discharges were abundant 

and physically weakening, but they relieved the psychic symptoms, 

though they occasioned mental distress, since F.C. is scrupulous 

in a religious sense, and also apprehensive of bad constitutional 

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 


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