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Graves, A. E. in addressee 
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From:
Charles Robert Darwin
To:
Anthony Elly Graves
Date:
9 Nov 1881
Source of text:
DAR 144: 347
Summary:

Cannot explain worm behaviour observed by AEG. Cannot believe in power of vision. Inclined to speculate on capacity for distinguishing damp air.

Contributor:
Darwin Correspondence Project