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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

attempts to prove a new physiological cycle deserve careful study 

and further investigation. The possibility of such a cycle should 

be borne in mind, but at present we are scarcely entitled to 

accept it. 

 

So far as I am aware, Professor Nelson's very interesting series of 

observations, which, for the first time, placed the question of a 

menstrual rhythm in men on a sound and workable basis, have not directly 

led to any further observations. I am, however, in possession of a much 

more extended series of ecbolic observations completed before Nelson's 

paper was published, although the results have only been calculated at a 

comparatively-recent date. I now propose to present a summary of these 

observations, and consider how far they confirm Nelson's conclusions. 

These observations cover no less a period than twelve years, between the 

ages of 17 and 29, the subject, W.K., being a student, and afterward 

schoolmaster, leading, on the whole, a chaste life. The records were 

faithfully made throughout the whole of this long period. Here, if 

anywhere, should be material for the construction of a menstrual rhythm 

on an ecbolic basis. While the results are in many respects instructive, 

it can scarcely, perhaps, be said that they absolutely demonstrate a 

monthly cycle. When summated in a somewhat similar manner to that adopted 

by Nelson in his ecbolic observations, it is not difficult to regard the 

maximum, which is reached on the 19th to 21st days of the summated 

physiological month, as a real menstrual ecbolic climax, for no other 

three consecutive days at all approach these in number of ecboles, while 

there is a marked depression occurring four days earlier, on the 16th day 

of the month. If, however, we split up the curve by dividing the period of 

twelve years into two nearly equal periods, the earlier of about seven 

years and the latter of about four years, and summate these separately, 

the two curves do not present any parallel as regards the menstrual cycle. 

It scarcely seems to me, therefore, that these curves present any 

convincing evidence in this case of a monthly ecbolic cycle (and, 

therefore, I refrain from reproducing them), although they seem to suggest 

such a cycle. Nor is there any reason to suppose that by adopting a 

different cycle of thirty days, or of twenty-three days, any more 

conclusive results would be obtained. 

 

It seems, however, when we look at these curves more closely, that they 

are not wholly without significance. If I am justified in concluding that 

they scarcely demonstrate a monthly cycle, it may certainly be added that 

they show a rudimentary tendency for the ecboles to fall into a 

fortnightly rhythm, and a very marked and unmistakable tendency to a 

weekly rhythm. The fortnightly rhythm is shown in the curve for the 

earlier period, but is somewhat disguised in the curve for the total 

period, because the first climax is spread over two days, the 7th and 8th 

of the month. If we readjust the curve for the total period by presenting 

the days in pairs, the fortnightly tendency is more clearly brought out 

(Chart I). 

 

A more pronounced tendency still is traceable to a weekly rhythm. This is, 

indeed, the most unquestionable fact brought out by these curves. All the 

maxima occur on Saturday or Sunday, with the minima on Tuesday, Wednesday, 

Thursday, or Friday. This very pronounced weekly rhythm will serve to 

swamp more or less completely any monthly rhythm on a 28-day basis. 


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