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From H. B. Brady   18 October 1871

Summary

On visit to Boston was told by N. S. Shaler how habits of rattlesnake are consistent with natural selection. Informs CD, as rattlesnake is considered by some a difficult case for his theory.

Author:  Henry Bowman Brady
Addressee:  Charles Robert Darwin
Date:  18 Oct 1871
Classmark:  DAR 160: 277
Letter no:  DCP-LETT-8015

From H. B. Brady   22 October 1871

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Summary

Explains further N. S. Shaler’s view [see 8015] on rattlesnake habits as consistent with natural selection: the rattle attracts rather than alarms its prey.

Author:  Henry Bowman Brady
Addressee:  Charles Robert Darwin
Date:  22 Oct 1871
Classmark:  DAR 160: 278
Letter no:  DCP-LETT-8028
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1871 (2)