The Variation of Animals and Plants under DomesticationNote 44 — Chapter XVII · ON THE GOOD EFFECTS OF CROSSING, AND ON THE EVIL EFFECTS OF CLOSE INTERBREEDING.Reading edition‘Proc. Entomolog. Soc.,’ Aug. 6th, 1860, p. 126.◇Copy noteReturn to CHAPTER XVII. ON THE GOOD EFFECTS OF CROSSING, AND ON THE EVIL EFFECTS OF CLOSE INTERBREEDING.