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1870-1879::1879::02::08 in date 
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From:
Charles Robert Darwin
To:
Edward Frankland
Date:
8 Feb 1879
Source of text:
The John Rylands Library, The University of Manchester (Frankland Collection)
Summary:

Gives results of the experiments: the leaves in most cases make the water alkaline. It cannot be ammonia. He and his son, Francis, suspect potash, which is valued as a manure. Will be grateful for the analysis EF has offered.

Contributor:
Darwin Correspondence Project