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From:
Charles Robert Darwin
To:
William Chester Tait
Date:
7 Apr [1869]
Source of text:
Natural History Museum, Library and Archives (General Special Collections DC AL 1/10)
Summary:

Drosophyllum plants recovering [from trip]. Describes experiments on them.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Alfred Russel Wallace
Date:
25 June [1869]
Source of text:
The British Library (Add MS 46434: 186–7); Natural History Museum (Entomology Manuscripts MSS WAL A 1:1 (127-128))
Summary:

On butterfly scales: there are many secondary characters which baffle conjecture.

Was forced to make additions to Origin as short as possible.

Contributor:
Darwin Correspondence Project