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Burdon Sanderson, J. S. in correspondent 
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From:
John Scott Burdon Sanderson, 1st baronet
To:
Charles Robert Darwin
Date:
13 Aug [1873]
Source of text:
DAR 58.1: 34–7
Summary:

Answers CD’s questions of 25 July [8987] about temperatures at which cold-blooded animals are killed.

Doubts heat rigor was induced in Drosera. Gives his view of the relation of excitability to increase in temperature.

Suggests experiment to show that electrical changes in plant are the same as in animal muscle and nerve [see Insectivorous plants, p. 318].

Contributor:
Darwin Correspondence Project
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From:
Charles Robert Darwin
To:
John Scott Burdon Sanderson, 1st baronet
Date:
15 Aug 1873
Source of text:
University of British Columbia Library, Rare Books and Special Collections (Darwin - Burdon Sanderson letters RBSC-ARC-1731-1-13)
Summary:

Thinks it would be worth while testing for electrical changes in the leaves of insectivorous plants.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
John Scott Burdon Sanderson, 1st baronet
Date:
27 Aug 1873
Source of text:
National Library of Scotland (MS.6103 ff.101)
Summary:

CD can provide leaves of Dionaea if JSBS wishes to investigate electric currents in them.

His experiments show that the digestive action of Drosera seems like that of true digestion.

Contributor:
Darwin Correspondence Project