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From Asa Gray [early August 1856]
Summary
Believes intermediate varieties are generally less numerous in individuals than the two states that they connect.
Discusses the difficulties of deciding what is the typical form of a species
and gives some opinions on the variability of introduced species compared with indigenous species.
| Author: | Asa Gray |
| Addressee: | Charles Robert Darwin |
| Date: | [early Aug 1856] |
| Classmark: | DAR 165: 93 |
| Letter no: | DCP-LETT-1934 |
