[24] The hermaphroditic idea of antiquity has repeatedly fascinated the human spirit. It certainly cannot be denied that something great and noble underlay this idea of overcoming sex. As long as eighty years before, Weininger and the modern apostles of bisexuality, Johann Michael Leupoldt, Professor of Medicine at the University of Erlangen, made the following prophecy: “_The reconciliation of the sexual contrast in every human individual will some day proceed so far_ that, dynamically understood, _with the general attainment of a kind of hermaphroditism_, humanity, having reached its earthly goal, will become totally extinct” (“Eubiotik oder Grundzüge der Kunst, als Mensch richtig, tüchtig, wohl und lang zu leben”--“Eubiotics, or Principles of the Art of Living as Man Rightly, Virtuously, Well, and Long,” pp. 232, 233; Berlin and Leipzig, 1828). This would amount to a kind of natural realization of E. von Hartmann’s ideal of conscious self-annihilation at the end of time! [25] G. Hirth, “Entropy of the Germinal System and Hereditary Enfranchisement,” pp. 89, 90 (Munich, 1900). [26] See note (^{36}), p. 94. [27] The “ulu” is a kind of knife used by Eskimo women. [28] _Cf._ in this connexion, Alice Salomon, “The Choice of a Profession for Girls”; Josephine Levy-Rathenau, “A Consideration of the Various Professions for Women, Qualifications and Prospects”; Elizabeth Altmann-Gottheiner, “A Study of Woman.” These are all published in “Das Buch vom Kinde” (“The Book of the Child”), edited by Adele Schreiber, Leipzig and Berlin, 1907, vol. ii., Div. 2, pp. 182-188, 189-209, 210-216 (contains an abstract of the most important literature of the subject).