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To Henry Johnson 2 May [1872]
Summary
Thanks for notes on worm-castings. Amount of ammonia surprises CD. David Forbes asserts that published analysis of carbon in vegetable matter valueless. Suspects that worms search for food and do not blindly swallow earth.
| Author: | Charles Robert Darwin |
| Addressee: | Henry Johnson |
| Date: | 2 May [1872] |
| Classmark: | Torquay Museum Society (AR470) |
| Letter no: | DCP-LETT-8306 |
From Henry Johnson 12 January [1872?]
Summary
Sends a map of a field showing the effect of earthworms.
| Author: | Henry Johnson |
| Addressee: | Charles Robert Darwin |
| Date: | 12 Jan [1872?] |
| Classmark: | DAR 168: 65 |
| Letter no: | DCP-LETT-12419 |
Author
| Darwin, C. R. | (1) |
| Johnson, Henry (a) | (1) |
Addressee
| Darwin, C. R. | (1) |
| Johnson, Henry (a) | (1) |
