[405] Cf. R. Thomalla, “Masturbation in the School: its Consequences and its Suppression,” published in the Journal for the Suppression of Venereal Diseases, 1906, vol. v., pp. 63-68.
[406] H. Ellis, “The Sexual Impulse and the Sense of Shame.”
[407] Gustav Aschaffenburg, “The Relations of the Sexual Life to the Origin of Nervous and Mental Disorders,” published in the Münchener Medizinische Wochenschrift, 1906, No. 37, p. 1794.
[408] Metchnikoff, “The Nature of Man” (English edition), p. 96.
[409] A. Eulenburg, “Sexual Neuropathy,” p. 80 (Leipzig, 1895).
[410] Otto Adler, “Deficient Sexual Sensibility in Woman,” p. 112 (Berlin, 1904). Mendel observed excessive masturbation in hypochondriacal women (Deutsche Medizinal-Zeitung, 1889, No. 15, p. 180).
[411] L. Löwenfeld, “The Sexual Life and Nervous Disorders,” fourth edition, p. 114 (Wiesbaden, 1906).
[412] Eduard Reich, “Immorality and Immoderation,” p. 122 (Neuwied and Leipzig, 1866).
[413] Felix Roubaud, “Treatise on Impotence and Sterility in Man and Woman,” third edition, p. 7 (Paris, 1876).
[414] W. A. Hammond, “Sexual Impotence in the Male and Female Sexes.”