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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

of attention, which for much of the year corresponded to the curve of 

muscular strength, being high during the cold winter months. Lobsien, at 

Kiel, seeking to test Schuyten's results and adopting a different method 

so as to gauge memory as well as attention, came to conclusions which 

confirmed those of Schuyten. He found a very marked increase of ability in 

December and January, with a fall in April; April and May were the 

minimum months, while July and October also stood low.[173] The inquiries 

of Schuyten and Lobsien thus seem to indicate that the voluntary aptitudes 

of muscular and mental force in children reach their maximum at a time of 

the year when most of the more or less involuntary activities we have been 

considering show a minimum of energy. If this conclusion should be 

confirmed by more extended investigations, it would scarcely be matter for 

surprise and would involve no true contradiction. It would, indeed, be 

natural to suppose that the voluntary and regulated activities of the 

nervous system should work most efficiently at those periods when they are 

least exposed to organic and emotional disturbance. 

 

So persistent a disturbing element in spring and autumn suggests that some 

physiological conditions underlie it, and that there is a real metabolic 

disturbance at these times of the year. So few continuous observations 

have yet been made on the metabolic processes of the body that it is not 

easy to verify such a surmise with absolute precision. Edward Smith's 

investigations, so far as they go, support it, and Perry-Coste's 

long-continued observations of pulse-frequency seem to show with fair 

regularity a maximum in early spring and another maximum in late 

autumn.[174] I may also note that Haig, who has devoted many years of 

observations to the phenomena of uric-acid excretion, finds that uric acid 

tends to be highest in the spring months, (March, April, May) and lowest 

at the first onset of cold in October.[175] 

 

Thus, while the sexual climaxes of spring and autumn are rooted in animal 

procreative cycles which in man have found expression in primitive 

festivals--these, again, perhaps, strengthening and developing the sexual 

rhythm--they yet have a wider significance. They constitute one among many 

manifestations of spring and autumn physiological disturbance 

corresponding with fair precision to the vernal and autumnal equinoxes. 

They resemble those periods of atmospheric tension, of storm and wind, 

which accompany the spring and autumn phases in the earth's rhythm, and 

they may fairly be regarded as ultimately a physiological reaction to 

those cosmic influences. 

 


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