To John Allen 25 May 1847
Summary
Thanks for JS’s note concerning a proposal [concerning some aspect of education of poor children?] which CD has to decline because of his poor health and his work in Natural History.
| Author: | Charles Robert Darwin |
| Addressee: | John Allen |
| Date: | 25 May 1847 |
| Classmark: | The National Library of Israel (Abraham Schwadron collection, Schwad 03 04 07) |
| Letter no: | DCP-LETT-1090F |
From J. S. Burdon Sanderson 25 April 1874
Summary
Purpose of experiments was to determine digestive activity of liquids containing pepsin. Gives required amounts of hydrochloric, propionic, butyric and valerianic acids. Describes experiment and gives results. Also experimented on digestive activity of butyric acid at greater temperatures than the termperature of the body.
| Author: | John Scott Burdon Sanderson, 1st baronet |
| Addressee: | Charles Robert Darwin |
| Date: | 25 Apr 1874 |
| Classmark: | DAR 58.2: 65–70 |
| Letter no: | DCP-LETT-9427F |
Document type
| letter | (2) |
Author
| Burdon Sanderson, J. S. | (1) |
| Darwin, C. R. | (1) |
Addressee
| Allen, John | (1) |
| Darwin, C. R. | (1) |
Correspondent
| Darwin, C. R. | (2) |
| Allen, John | (1) |
| Burdon Sanderson, J. S. | (1) |
