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To Asa Gray 5 September [1857]
Summary
Encloses an abstract of his ideas on natural selection and the principle of divergence; the "means by which nature makes her species".
Discusses varieties and close species in large and small genera, finding some data from AG in conflict with his expectations.
Has been observing the action of bees in fertilising kidney beans and Lobelia.
| Author: | Charles Robert Darwin |
| Addressee: | Asa Gray |
| Date: | 5 Sept [1857] |
| Classmark: | Archives of the Gray Herbarium, Harvard University (48) |
| Letter no: | DCP-LETT-2136 |
