Darwin-Hooker Letters : Letter from Darwin, C. R. to Hooker, J. D. on 12 [Dec 1862]

Darwin, C. R.

Darwin-Hooker Letters

Maintains his view on crossing. Thinks practical breeders would agree with him; doubts that variability and domestication are at all necessarily correlative. Identical plants in different conditions a heavy argument against "direct action" [of physical conditions]. His 1000-pigeon case is altered if long-beaked are in least degree sterile with short-beaked. His work on dimorphism inclines him to believe that sterility is at first a selected quality to keep incipient species distinct. Case of easy modification of Lythrum pollen to favour or prevent crossing. Monsters. Has just finished chapter on variations of cultivated plants. Edinburgh doctors have sent him Diploma of Medical Society.


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