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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

among many primitive races menstruation only occurs at long intervals. 

Thus among Eskimo women menstruation follows the peculiar cosmic 

conditions to which the people are subjected; Cook, the ethnologist of the 

Peary North Greenland expedition, found that menstruation only began after 

the age of nineteen, and that it was usually suppressed during the winter 

months, when there is no sun, only about one in ten women continuing to 

menstruate during this period.[85] It was stated by Velpeau that Lapland 

and Greenland women usually only menstruate every three months, or even 

only two or three times during the year. On the Faroe Islands it is said 

that menstruation is frequently absent. Among the Samoyeds, Mantegazza 

mentions that menstruation is so slight that some travelers have denied 

its existence. Azara noted among the Guaranis of Paraguay that 

menstruation was not only slight in amount, but the periods were separated 

by long intervals. Among the Indians in North America, again, menstruation 

appears to be scanty. Thus, Holder, speaking of his experience with the 

Crow Indians of Montana, says: "I am quite sure that full-blood Indians in 

this latitude do not menstruate so freely as white women, not usually 

exceeding three days."[86] Among the naked women of Tierra del Fuego, it 

is said that there is often no physical sign of the menses for six months 

at a time. These observations are noteworthy, though they clearly 

indicate, on the whole, that primitiveness in race is a very powerless 

factor without a cold climate. On the other hand, again, there is some 

reason to suppose that in Europe there is a latent tendency in some women 

for the menstrual cycle to split up further into two cycles, by the 

appearance of a latent minor climax in the middle of the monthly interval. 

I allude to the phenomenon usually called _Mittelschmerz_, middle period, 

or intermenstrual pain. 

 

Since the investigations of Goodman, Stephenson, Van Ott, Reinl, 

Jacobi, and others, it has been generally recognized that 

menstruation is a continuous process, the flow being merely the 

climax of a menstrual cycle, a physiological wave which is in 

constant flux or reflux. This cycle manifests itself in all a 

woman's activities, in metabolism, respiration, temperature, 

etc., as well as on the nervous and psychic side. The healthier 

the woman is, the less conscious is the cyclic return of her 

life, but the cycle may be traced (as Hegar has found) even 

before puberty takes place, while Salerni has found that even in 

amenorrhoea the menstrual cycle still manifests itself in the 

temperature and respiration. (_Rivista Sperimentale di 

Freniatria_, XXX, fasc. 2-3.) 

 

For a summary of the phenomena of the menstrual cycle, see 

Havelock Ellis, _Man and Woman_, fourth ed., revised and 

enlarged, Ch. XI; "The Functional Periodicity of Women." Cf. 

Keller, _Archives Generales de Medecine_, May, 1897; Hegar, 

_Allgemeine Zeitschrift fuer Psychiatrie_, 1901, Heft 2 and 3; 

Helen MacMurchy, _Lancet_, Oct. 5. 1901; A.E. Giles, 

_Transactions Obstetrical Society London_, vol. xxxix, p. 115, 

etc. 

 

_Mittelschmerz_ is a condition of pain occurring about the middle 

of the intermenstrual period, either alone or accompanied by a 

slight sanguineous discharge, or, more frequently, a 

non-sanguineous discharge. (In a case described by Van Voornveld, 


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