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From G. H. Darwin   6 February 1874

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Summary

Finds statistical evidence that cousin marriages are at least three times as frequent in "our rank" as in the lower.

Author:  George Howard Darwin
Addressee:  Charles Robert Darwin
Date:  6 Feb 1874
Classmark:  DAR 210.2: 33
Letter no:  DCP-LETT-9268

From J. C. Symmes   6 February 1874

Summary

Believes that he has an important physical theory: all atoms revolve.

Author:  John Cleves Symmes
Addressee:  Charles Robert Darwin
Date:  6 Feb 1874
Classmark:  DAR 177: 339
Letter no:  DCP-LETT-9269