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1870-1879::1873::10 in date 
Darwin, C. R. in correspondent 
Frankland, Edward in correspondent 
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DCP-LETT-9090A

From:
Charles Robert Darwin
To:
Edward Frankland
Date:
7 Oct [1873]
Source of text:
The John Rylands Library, The University of Manchester
Summary:

Requests a piece of the most sensitive litmus paper in order to test the secretions of minute hairs of plants which catch minute flies. [See 9098.]

Contributor:
Darwin Correspondence Project

DCP-LETT-9094

From:
Edward Frankland
To:
Charles Robert Darwin
Date:
10 Oct 1873
Source of text:
DAR 58.1: 44–6
Summary:

The results of EF’s tests for acids in the secretion of Drosera are largely negative [see Insectivorous plants, p. 88].

Contributor:
Darwin Correspondence Project
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DCP-LETT-9096A

From:
Charles Robert Darwin
To:
Edward Frankland
Date:
13 Oct 1873
Source of text:
The John Rylands Library, The University of Manchester
Summary:

Finds the negative information sent by EF of great interest [see 9094].

More on his own experiments and the perplexing results when using the sensitive litmus paper.

Contributor:
Darwin Correspondence Project

DCP-LETT-9098

From:
Edward Frankland
To:
Charles Robert Darwin
Date:
16 Oct 1873
Source of text:
DAR 164: 209
Summary:

Sends some litmus paper for CD.

Contributor:
Darwin Correspondence Project
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DCP-LETT-9100A

From:
Charles Robert Darwin
To:
Edward Frankland
Date:
18 Oct [1873]
Source of text:
The John Rylands Library, The University of Manchester
Summary:

Apologises for his ignorance in interpreting the results secured in his testing with blue litmus paper.

Contributor:
Darwin Correspondence Project
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