Note 71 — Chapter XVII · ON THE GOOD EFFECTS OF CROSSING, AND ON THE EVIL EFFECTS OF CLOSE INTERBREEDING.
Reading edition
‘Jenaische Zeitschrift fur Naturwiss.’ B. vii. p. 22, 1872, and p. 441, 1873. A large part of this paper has been translated in the ‘American Naturalist,’ 1874, p. 223.