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DCP-LETT-8158

From:
Charles Robert Darwin
To:
Asa Gray
Date:
15 Jan 1872
Source of text:
Archives of the Gray Herbarium, Harvard University (99)
Summary:

Questions AG on earthworm activity in North America and would welcome information from northern Canada if AG has a correspondent there.

Contributor:
Darwin Correspondence Project

DCP-LETT-8402

From:
Charles Robert Darwin
To:
Asa Gray
Date:
8 July [1872]
Source of text:
Archives of the Gray Herbarium of Harvard University (107)
Summary:

Thanks for AG’s book, How plants behave [see 8363].

Is correcting proofs of Expression.

Contributor:
Darwin Correspondence Project

DCP-LETT-8568

From:
Charles Robert Darwin
To:
Asa Gray
Date:
22 Oct 1872
Source of text:
Gray Herbarium of Harvard University (100)
Summary:

Spiralling of tendrils.

Has worked hard on Drosera.

Is interested in tracing the "nerves" of Dionaea which follow the vascular bundles. Finds he can paralyse half of the leaf by pricking it at a certain point.

Wishes AG to carry out two experiments on D. filiformis.

Has received AG’s Dubuque address [Am. J. Sci. 3d ser. 4 (1872): 282–98].

Contributor:
Darwin Correspondence Project
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