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Johnson, Henry (a) in correspondent 
Private collection (N 20701–4) in repository 
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DCP-LETT-8118A

From:
Charles Robert Darwin
To:
Henry Johnson
Date:
23 Dec 1871
Source of text:
Private collection
Summary:

Is unable to accept invitation to Shrewsbury. Is grateful for offer of assistance at Wroxeter.

The weight of dry earth cast up by worms is 161/10 tons per acre annually.

Contributor:
Darwin Correspondence Project

DCP-LETT-12236A

From:
Charles Robert Darwin
To:
Henry Johnson
Date:
24 Sept 1879
Source of text:
Private collection
Summary:

Sends the requested signature,

with sympathy for HHJ’s state of health [see 12236].

Reports that HJ’s experiments on tension of parts are often quoted in German works and periodicals.

Contributor:
Darwin Correspondence Project
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