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DCP-LETT-9061A

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

Although CD’s experiments with pepsin were unsuccessful, he observed that the glands [of Drosera] as far as acid is concerned act just as the stomach of a mammal. Further experiments detailed. The secretion must contain something analogous to pepsin. [See 9062.]

Contributor:
Darwin Correspondence Project

DCP-LETT-9062

From:
Edward Frankland
To:
Charles Robert Darwin
Date:
22 Sept 1873
Source of text:
DAR 58.1: 38–9
Summary:

CD’s discovery of acidity of Drosera secretion is interesting. EF explains how hydrochloric acid can be detected and identified. [See Insectivorous plants, p. 88.]

Contributor:
Darwin Correspondence Project
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DCP-LETT-9064A

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

Will follow EF’s suggestions as to securing purity of fibrin.

Contributor:
Darwin Correspondence Project

DCP-LETT-9076

From:
Edward Frankland
To:
Charles Robert Darwin
Date:
27 Sept 1873
Source of text:
DAR 164: 208
Summary:

Has sent CD some pure distilled water for his Drosera experiments.

Contributor:
Darwin Correspondence Project
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DCP-LETT-9077A

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

Is sending washings of 445 leaves in EF’s distilled water with 20 grains of carbonate of soda. Details of the difficulties and complications involved.

Contributor:
Darwin Correspondence Project
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