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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

 

 

It is instructive to compare the conception-rate of Europe with that of a 

non-European country. Such a comparison has been made by S.A. Hill for the 

Northwest Provinces of India. Here the Holi and other erotic festivals 

take place in spring; but spring is not the period when conceptions 

chiefly take place; indeed, the prevalence of erotic festivals in spring 

appears to Hill an argument in favor of those festivals having originated 

in a colder climate. The conceptions show a rise through October and 

November to a maximum in December and January, followed by a steady and 

prolonged fall to a minimum in September. This curve can be accounted for 

by climatic and economic conditions. September is near the end of the long 

and depressing hot season, when malarial influences are rapidly 

increasing to a maximum, the food-supply is nearly exhausted, and there is 

the greatest tendency to suicide. With October it forms the period of 

greatest mortality. December, on the other hand, is the month when food is 

most abundant, and it is also a very healthy month.[155] 

 

For a summary of the chief researches into this question, see 

Ploss and Bartels, _Das Weib_; also, Rosenstadt, "Zur Frage nach 

den Ursachen welche die Zahl der Conceptionen, etc," 

_Mittheilungen aus den embryologischen Institute Universitaet 

Wien_, second series, fasc. 4, 1890. Rosenstadt concludes that 

man has inherited from animal ancestors a "physiological custom" 

which has probably been further favored by climatic and social 

conditions. "Primitive man," he proceeds, "had inherited from his 

ancestors the faculty of only reproducing himself at determined 

epochs. On the arrival of this period of rut, fecundation took 

place on a large scale, this being very easy, thanks to the 

promiscuity in which primitive man lived. With the development of 

civilization, men give themselves up to sexual relations all the 

year around, but the 'physiological custom' of procreating at a 

certain epoch has not completely disappeared; it remains as a 

survival of the animal condition, and manifests itself in the 

recrudescence of the number of conceptions during certain months 

of the year." O. Rosenbach ("Bemerkungen ueber das Problem einer 

Brunstzeit beim Menschen," _Archiv fuer Rassen und 

Gesellschafts-Biologie_, Bd. III, Heft 5) has also argued in 

favor of a chief sexual period in the year in man, with secondary 

and even tertiary climaxes, in March, August, and December. He 

finds that in some families, for several generations, birthdays 

tend to fall in the same months, but his paper is, on the whole, 

inconclusive. 

 

Some years ago, Prof. J.B. Haycraft argued, on the basis of data 

furnished by Scotland, that the conception-rate corresponds to 

the temperature-curve (Haycraft, "Physiological Results of 

Temperature Variation," _Transactions of the Royal Society of 

Edinburgh_, vol. xxix, 1880). "Temperature," he concluded, "is 

the main factor regulating the variations in the number of 

conceptions which occur during the year. It increases their 

number with its elevation, and this on an average of 0.5 per 

cent, for an elevation of 1 deg. F." Whether or not this theory may 

fit the facts as regards Scotland, it is certainly altogether 

untenable when we take a broader view of the phenomena. 

 

Recently Dr. Paul Gaedeken of Copenhagen has argued in a detailed 


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