en_,
Kempten, 1907.

[5] Rudeck, _Die Liebe_ (Leipzig, undated), p. 158.

[6] Groos, _Die Spiele der Tiere_ (_The Games of Animals_), Jena,
1896.

[7] See a translation by Dr. Brill, of New York, of Freud's
_Selected Papers on Hysteria and other Psychoneuroses_ (1909).

[8] _Die Stoerungen der Geschlechtsfunctionen des Mannes_ (_The
Disturbances of the Male Sexual Functions_), 2nd ed., Vienna,
1901, p. 8.

[9] Otto Adler, _Die mangelhafte Geschlechtsempfindung des
Weibes_ (_Inadequacy of Sexual Sensation in Woman_), Berlin,
1904, p. 54 _et seq._

[10] Marthe Francillon, _Essai sur la Puberte chez la Femme_,
Paris, 1906.

[11] _Man and Woman_, 4th ed., London, 1904.

[12] _Der Koerper des Kindes_ (_The Body of the Child_),
Stuttgart, 1903.

[13] Halban, _Die Entstehung des Geschlechtscharakters_ (_The
Origin of Sexual Differentiation_), Archiv fuer Gynaekologie, vol.
lxx., Heft 2. p. 268.

[14] _Man and Woman_, London.

[15] _Weib und Mann_, Berlin, 1897, p, 116.

[16] Meumann, _Vorlesungen zur Einfuehrung in die experimentelle
Paedagogik und ihre psychologische Grundlagen_ (_Introductory
Lectures on Experimental Pedagogy and its Psychological Basis_),
Leipzig, 1907, vol. i. p. 145.

[17] _Zeitschrift fuer Psychologie_, Leipzig, 1906, p. 384.

[18] _Geschlecht und Krankheit_ (_Sex and Disease_), Halle, 1903.

[19] _Die Hysterie im Kindesalter_ (_Hysteria in Childhood_), 2nd
ed., Halle, 1906.

[20] _Die Hysterie des Kindes_ (_Hysteria in the Child_), p. 8,
Berlin, 1905.

[21] _Vorlesungen ueber Stoerungen der Sprache_ (_Lectures on
Disturbances of Speech_), p. 105. Berlin, 1893.

[22] _Hautkrankheiten und Sexualitaet_ (_Diseases of the Skin in
Relation to Sex_). Reprinted from the _Wiener Klinik_, 1906.

[23] William Douglas Morrison, _Jugendliche Uebeltaeter_
(_Youthful Delinquents_), p. 28. Leipzig, 1899.

[24] _Die Seele des Kindes_ (_The Soul of the Child_) p. 147, 4th
ed., Leipzig, 1895.

[25] Although in various other parts of this book I draw
attention to the fact that the sexual processes of childhood
described by me are not to be witnessed in every child, but that
on the contrary there are many children in whom such sexual
phenomena are by no means to be observed, I take this additional
opportunity of stating categorically that erections naturally
occur in children less frequently than in adults; they are in
fact notably less common in the former, but nevertheless erection
is not,