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Burdon Sanderson, J. S. in correspondent 
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From:
Charles Robert Darwin
To:
John Scott Burdon Sanderson, 1st baronet
Date:
29 Mar 1873
Source of text:
DAR 147: 406
Summary:

Reports that he has not received JSBS’s book on histology and physiology [Sanderson ed., Handbook for the physiological laboratory (1873)], which Edward Emmanuel Klein told CD’s son was to be sent. He asks for information so that he may thank Dr Klein. [Klein and Michael Foster were co-authors with JSBS.]

He has returned the Gazette to Dr T. L. Brunton. [See 8825.]

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
John Scott Burdon Sanderson, 1st baronet
Date:
24 June 1873
Source of text:
University of British Columbia Library, Rare Books and Special Collections (Darwin - Burdon Sanderson letters RBSC-ARC-1731-1-10)
Summary:

Wishes JSBS to look over an abstract of his Drosera experiments and to answer some questions on it.

Contributor:
Darwin Correspondence Project
From:
John Scott Burdon Sanderson, 1st baronet
To:
Charles Robert Darwin
Date:
25 June 1873
Source of text:
DAR 58.1: 116–19
Summary:

Informs CD of the effects of certain salts and other chemicals on animals.

Comments on CD’s results with Drosera. Suggests some experiments.

Contributor:
Darwin Correspondence Project
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From:
Charles Robert Darwin
To:
John Scott Burdon Sanderson, 1st baronet
Date:
26 June [1873]
Source of text:
University of British Columbia Library, Rare Books and Special Collections (Darwin - Burdon Sanderson letters RBSC-ARC-1731-1-08)
Summary:

Would welcome JSBS visit to discuss Drosera. Nitrogenous fluids can act as ferments only if they act merely by exciting molecular movement in adjoining molecules.

Glass and cotton excite movement and cause cell contents to change visibly. Huxley coming to see this phenomenon.

Studied effect of poisons 12 or 15 years ago to see whether the action was similar to that on nervous tissue.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
John Scott Burdon Sanderson, 1st baronet
Date:
25 July 1873
Source of text:
University of British Columbia Library, Rare Books and Special Collections (Darwin - Burdon Sanderson letters RBSC-ARC-1731-1-11)
Summary:

Describes his recent work on Drosera digestion of organic materials, e.g., albumen and gelatin. Edward Frankland has given CD a rough test for pepsin. Some plant extracts cause as much inflection as meat. Has found some reversible inflection with heat and perhaps some heat rigor. Has measured the extreme sensitivity of Drosera with very dilute solution of ammonium phosphate.

Contributor:
Darwin Correspondence Project
From:
John Scott Burdon Sanderson, 1st baronet
To:
Charles Robert Darwin
Date:
28 July [1873]
Source of text:
DAR 58.1: 28–9
Summary:

A hasty answer to CD’s letter [8987] of 25 July. Mentions Dr Osler’s observations on behaviour of colourless blood corpuscles in solutions of sodium and potassium salts of same strength.

Contributor:
Darwin Correspondence Project
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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
From:
Charles Robert Darwin
To:
John Scott Burdon Sanderson, 1st baronet
Date:
9 Sept [1873]
Source of text:
University of British Columbia Library, Rare Books and Special Collections (Darwin - Burdon Sanderson letters RBSC-ARC-1731-1-14)
Summary:

Pleased JSBS has decided to work on Drosera; sends plants. Does not know whether thermo-electric pile could detect temperature change when leaves close.

CD’s experiment with very weak hydrochloric acid repeated with success: the plants digest albumen more quickly.

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

Thanks JSBS for telegraphing his results, which seem very remarkable; feels he should now try Drosera.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
John Scott Burdon Sanderson, 1st baronet
Date:
14 Sept [1873]
Source of text:
University of British Columbia Library, Rare Books and Special Collections (Darwin - Burdon Sanderson letters RBSC-ARC-1731-1-9)
Summary:

Very pleased at JSBS’s discovery ["On the electrical phenomena which accompany the contractions of the leaf of Dionaea muscipula", Rep. BAAS 43 (1873): 133].

Asks for pure animal substances [proteins] for Drosera experiments. His other sources have been T. L. Brunton, Edward Frankland, W. A. Miller (now dead), and Hoffmann of Berlin [A. W. von Hofmann?].

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
John Scott Burdon Sanderson, 1st baronet
Date:
1 Oct [1873]
Source of text:
University of British Columbia Library, Rare Books and Special Collections (Darwin - Burdon Sanderson letters RBSC-ARC-1731-1-7)
Summary:

Hears from Frank [Darwin] that Drosera behaves perversely. Suggests that motor influence may move longitudinally away from the excited glands.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
John Scott Burdon Sanderson, 1st baronet
Date:
18 Oct [1873]
Source of text:
University of British Columbia Library, Rare Books and Special Collections (Darwin - Burdon Sanderson letters RBSC-ARC-1731-1-26)
Summary:

Suggests experiments on artificial digestion.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
John Scott Burdon Sanderson, 1st baronet
Date:
15 Nov [1873]
Source of text:
University of British Columbia Library, Rare Books and Special Collections (Darwin - Burdon Sanderson letters RBSC-ARC-1731-1-12)
Summary:

Frankland is sending JSBS organic acids for him to try artificial digestion. CD will send globulin and haemoglobin.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
John Scott Burdon Sanderson, 1st baronet
Date:
19 Nov [1873]
Source of text:
University of British Columbia Library, Rare Books and Special Collections (Darwin - Burdon Sanderson letters RBSC-ARC-1731-1-6)
Summary:

Sends the very little globulin and haemoglobin he has to be tested with artificial gastric juice. He could get more from Samuel William Moore. Perhaps T. L. Brunton knows about the digestion of chlorophyll by animals.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
John Scott Burdon Sanderson, 1st baronet
Date:
21 Mar 1874
Source of text:
University of British Columbia Library, Rare Books and Special Collections (Darwin - Burdon Sanderson letters RBSC-ARC-1731-1-16)
Summary:

Sends his MS on Dionaea and hopes it may be useful for JSBS’s lecture ["On the mechanism of the leaf of Dionaea muscipula", Not. Proc. R. Inst. G. B. 7 (1874): 332–5].

Contributor:
Darwin Correspondence Project
From:
John Scott Burdon Sanderson, 1st baronet
To:
Charles Robert Darwin
Date:
23 Mar [1874]
Source of text:
University of British Columbia Library, Rare Books and Special Collections (Darwin - Burdon Sanderson letters RBSC-ARC-1731-1-36)
Summary:

Thanks for MS which he intends to read while on a week’s holiday.

Sends thanks for Francis Darwin’s offer of help and says that Francis’s experiments on digestion are complete.

Contributor:
Darwin Correspondence Project
From:
John Scott Burdon Sanderson, 1st baronet
To:
Charles Robert Darwin
Date:
30 Mar [1874]
Source of text:
University of British Columbia Library, Rare Books and Special Collections (Darwin - Burdon Sanderson letters RBSC-ARC-1731-1-28); DAR 58.2: 59–64
Summary:

Sends results of experiments on digestion. Encloses two sets of notes: "Experiments on the digestibility of certain preparations sent by Mr Darwin" and "Note for Mr Darwin" [marked by CD for insertion in ch. 6 of Insectivorous plants].

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
John Scott Burdon Sanderson, 1st baronet
Date:
31 Mar [1874]
Source of text:
University of British Columbia Library, Rare Books and Special Collections (Darwin - Burdon Sanderson letters RBSC-ARC-1731-1-5)
Summary:

Thanks for the careful experiments, particularly on organic acids.

Contributor:
Darwin Correspondence Project