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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

attributable chiefly to two facts: (1) that the second curve is more even 

throughout, neither maximum nor minimum being so strongly marked as in the 

first; and (2) that the main maximum occurs in the middle of the month 

instead of on the second lunar day, and the absence of the marked initial 

maximum alters the character of the first week or so of this curve. It is, 

however, scarcely fair to lay any great stress on the characters of curves 

obtained from such scanty data, and we will, therefore, pass to the 

continuous curve, the study of which will prove more valuable.[381] 

 

Now, even a cursory examination of this continuous curve will yield the 

following results:-- 

 

1. The discharges occur most frequently on the second lunar day. 

 

2. The days of the next most frequent discharges are the 22d; the 13th; 

the 7th, 20th, and 26th; the 11th and 16th; so that, if we regard only the 

first six of these, we find that the discharges occur most frequently on 

the 2d, 7th, 13th, 20th, 22d, and 26th lunar days--i.e., the discharges 

occur most frequently on days separated, on the average, by four-day 

intervals; but actually the period between the 20th and 22d days is that 

characterized by the most frequent discharges. 

 

3. The days of minimum of discharge are the 1st, 5th, 15th, 18th, and 

21st. 

 

4. The curve is characterized by a continual see-sawing; so that every 

notable maximum is immediately followed by a notable minimum. Thus, the 

curve is of an entirely different character from that representing the 

monthly rhythm of the pulse,[382] and this is only what one might have 

expected; for, whereas the _mean_ pulsations vary only very slightly from 

day to day,--thus giving rise to a gradually rising or sinking curve,--a 

discharge from the sexual system relieves the tension by exhausting the 

stored-up secretion, and is necessarily followed by some days of rest and 

inactivity. In the very nature of the case, therefore, a curve of this 

kind could not possibly be otherwise than most irregular if the discharges 

tended to occur most frequently upon definite days of the month; and thus 

the very irregularity of the curve affords us proof that there is a 

regular male periodicity, such that on certain days of the month there is 

greater probability of a spontaneous discharge than on any other days. 

 

5. Gratifying, however, though this irregularity of the curve may be, yet 

it entails a corresponding disadvantage, for we are precluded thereby from 

readily perceiving the characteristics of the monthly rhythm as a whole. I 

thought that perhaps this aspect of the rhythm might be rendered plainer 

if I calculated the data into two-day averages; and the result, as shown 

in Chart 10, is extremely satisfactory. Here we can at once perceive the 

wonderful and almost geometric symmetry of the monthly rhythm; indeed, if 

the third maximum were one unit higher, if the first minimum were one unit 

lower, and if the lines joining the second minimum and third maximum, and 

the fourth maximum and fourth minimum, were straight instead of being 

slightly broken, then the curve would, in its chief features, be 

geometrically symmetrical; and this symmetry appears to me to afford a 

convincing proof of the representative accuracy of the curve. We see that 

the month is divided into five periods; that the maxima occur on the 

following pairs of days: the 19th-20th, 13th-14th, 25th-26th, 1st-2d, 

7th-8th; and that the minima occur at the beginning, end, and exact middle 


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