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To J. S. Burdon Sanderson   25 July 1873

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.

Author:  Charles Robert Darwin
Addressee:  John Scott Burdon Sanderson, baronet
Date:  25 July 1873
Classmark:  University of British Columbia Library, Rare Books and Special Collections (Darwin - Burdon Sanderson letters RBSC-ARC-1731-1-11)
Letter no:  DCP-LETT-8987

From J. S. Burdon Sanderson   28 July [1873]

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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.

Author:  John Scott Burdon Sanderson, baronet
Addressee:  Charles Robert Darwin
Date:  28 July [1873]
Classmark:  DAR 58.1: 28–9
Letter no:  DCP-LETT-8988
Document type
letter (2)
Date
1873
07
25 (1)
28 (1)
letter