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Darwin, Francis in correspondent 
Gilbert, J. H. in correspondent 
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From:
Francis Darwin
To:
Joseph Henry Gilbert
Date:
8 June 1876
Source of text:
Rothamsted Research (GIL13)
Summary:

Asks about constituents of burnt soil.

Contributor:
Darwin Correspondence Project
From:
Joseph Henry Gilbert
To:
Francis Darwin
Date:
10 June 1876
Source of text:
Rothamsted Research (GIL13)
Summary:

On burnt soils.

Contributor:
Darwin Correspondence Project