Note 2980 — Chapter XXI · THE FORMS OF HUMAN MARRIAGE
Reading edition
Ploss, in ‘Monatsschrift f. Geburtskunde,’ vol. xii. p. 352. In the region between 501 to 1,000 feet, which is the most fertile (ibid., p. 353), the proportion was 105·7 to 100.
Reading edition
Ploss, in ‘Monatsschrift f. Geburtskunde,’ vol. xii. p. 352. In the region between 501 to 1,000 feet, which is the most fertile (ibid., p. 353), the proportion was 105·7 to 100.