percentage of inverts which may sometimes be as much as 5 per cent., though such estimates must always be hazardous. Among women of the same class the percentage seems to be at least double, though here the phenomena are less definite and deep-seated. This seems to be a moderate estimate for this class, which includes, however, it must be remembered, a considerable proportion of individuals who are somewhat abnormal in other respects. As we descend the scale the phenomena are doubtless less common, though when we reach the working class we come to that comparative indifference to which allusion has already been made. Taken altogether we may probably conclude that the proportion of inverts is the same as in other related and neighboring lands, that is to say, slightly over 2 per cent. That would give the homosexual population of Great Britain as somewhere about a million. FOOTNOTES: [1] Taking all its forms _en bloc_, as they are known to the police, homosexuality is seen to possess formidable proportions. Thus in France, from official papers which passed through M. Carlier's bureau during ten years (1860-70), he compiled a list of 6342 pederasts who came within the cognizance of the police; 2049 Parisians, 3709 provincials, and 584 foreigners. Of these, 3432, or more than the half, could not be convicted of illegal acts. [2] The chief general collection of data (not here drawn upon) concerning homosexuality among animals is by the zoölogist Prof. Karsch, "Päderastie und Tribadie bei den Tieren," _Jahrbuch für sexuelle Zwischenstufen_, vol. ii. Brehm's _Tierleben_ also contains many examples. See also a short chapter (ch. xxix) in Hirschfeld's _Homosexualität_. [3] H. Sainte-Claire Deville, "De l'Internat et son influence sur l'education de la jeunesse," a paper read to the Académie des Sciences Morales et Politiques, July 27, 1871, and quoted by Chevalier, _L'Inversion Sexuelle_, pp. 204-5. [4] M. Bombarda, _Comptes rendus Congrès Internationale de l'Anthropologie Criminelle_, Amsterdam, p. 212. [5] Lacassagne, "De la Criminalité chez les Animaux," _Revue Scientifique_, 1882. [6] Steinach, "Utersuchungen zu vergleichende Physiologie," _Archiv für die Gesammte Physiologie_, Bd. lvi, 1894, p. 320. [7] Féré, _Comptes-rendus Société de Biologie_, July 30, 1898. We may perhaps connect this with an observation of E. Selous (_Zoölogist_, May and Sept., 1901) on a bird, the Great Crested Grebe; after pairing, the male would crouch to the female, who played his part to him; the same thing is found among pigeons. Selous suggests that this is a relic of primitive hermaphroditism. But it may be remembered that in the male generally sexual intercourse tends to be more exhausting than in the female; this fact would favor a reversion of their respective parts.