The Variation of Animals and Plants under DomesticationNote 42 — Chapter XVII · ON THE GOOD EFFECTS OF CROSSING, AND ON THE EVIL EFFECTS OF CLOSE INTERBREEDING.Reading edition‘Das Ganze der Taubenzucht,’ 1837, s. 18.◇Copy noteReturn to CHAPTER XVII. ON THE GOOD EFFECTS OF CROSSING, AND ON THE EVIL EFFECTS OF CLOSE INTERBREEDING.