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From H. C. Sorby   22 March 1876

Summary

Discusses chemical tests for the detection of glucose and cane-sugar in solution.

Author:  Henry Clifton Sorby
Addressee:  Charles Robert Darwin
Date:  22 Mar 1876
Classmark:  DAR 177: 218
Letter no:  DCP-LETT-10425

From H. C. Sorby   28 December 1881

Summary

Discusses colour changes of plant colouring material.

Is doing much marine work from his yacht; asks whether CD has any suggestions for profitable observations.

Author:  Henry Clifton Sorby
Addressee:  Charles Robert Darwin
Date:  28 Dec 1881
Classmark:  DAR 177: 219
Letter no:  DCP-LETT-13585

From H. C. Sorby   3 January 1882

Summary

Reports the inconclusive results of some experiments he has been doing for CD [related to plant colouring material?].

Author:  Henry Clifton Sorby
Addressee:  Charles Robert Darwin
Date:  3 Jan 1882
Classmark:  DAR 177: 220
Letter no:  DCP-LETT-13598

From H. C. Sorby   9 September 1874

Summary

Reports on his spectroscopic examination of the colouring matter in the hairs (tentacles) of Drosera.

Author:  Henry Clifton Sorby
Addressee:  Charles Robert Darwin
Date:  9 Sept 1874
Classmark:  DAR 58.1: 88–9
Letter no:  DCP-LETT-9630
Document type
letter (4)
Author
Addressee
Correspondent
Darwin, C. R.[X]
Sorby, H. C.[X]
Date
1874 (1)
1876 (1)
1881 (1)
1882 (1)
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