To J. H. Gilbert 5 February 1881
Summary
Asks whether vegetable mould has an acid reaction. The contents of intestines of earthworms and castings are acid, which leads him to inquire about mould.
| Author: | Charles Robert Darwin |
| Addressee: | Joseph Henry Gilbert |
| Date: | 5 Feb 1881 |
| Classmark: | Rothamsted Research (GIL13) |
| Letter no: | DCP-LETT-13038 |
To J. H. Gilbert 25 February 1881
Summary
Discusses acidity of earthworm castings. JHG’s reply will make him more cautious.
Would like to see W. A. Detmer’s paper [Landwirtsch. Versuchs-Stat. 14 (1871): 248–300] and S. W. Johnson’s work [How crops feed].
Comments on food value of white and brown bread.
| Author: | Charles Robert Darwin |
| Addressee: | Joseph Henry Gilbert |
| Date: | 25 Feb 1881 |
| Classmark: | Rothamsted Research (GIL13) |
| Letter no: | DCP-LETT-13066 |
To J. H. Gilbert 15 March 1881
Summary
Returns the two books JHG had lent him. "I can plainly see I had better say nothing about the acidity of common mould."
| Author: | Charles Robert Darwin |
| Addressee: | Joseph Henry Gilbert |
| Date: | 15 Mar 1881 |
| Classmark: | Rothamsted Research (GIL13) |
| Letter no: | DCP-LETT-13087 |
To J. H. Gilbert 8 June 1881
Summary
Regrets that he has not strength enough to visit [Rothamsted].
| Author: | Charles Robert Darwin |
| Addressee: | Joseph Henry Gilbert |
| Date: | 8 June 1881 |
| Classmark: | Rothamsted Research (GIL13) |
| Letter no: | DCP-LETT-13198 |
From J. H. Gilbert 22 February 1881
Summary
The laboratory has scarcely any experimental evidence on acidity of humus soil and earthworm excreta. Refers CD to some sources of information.
| Author: | Joseph Henry Gilbert |
| Addressee: | Charles Robert Darwin |
| Date: | 22 Feb 1881 |
| Classmark: | DAR 165: 43 |
| Letter no: | DCP-LETT-13063 |
From J. H. Gilbert 7 March 1881
Summary
Sends some books.
| Author: | Joseph Henry Gilbert |
| Addressee: | Charles Robert Darwin |
| Date: | 7 Mar 1881 |
| Classmark: | Rothamsted Research (GIL13) |
| Letter no: | DCP-LETT-13076F |
From J. H. Gilbert 5 June 1881
Summary
Invites CD to visit Rothamsted. The experimental plots are at their best "as illustrating the vast influence of external conditions on the character and results of the struggle between the numerous components of an established mixed herbage".
| Author: | Joseph Henry Gilbert |
| Addressee: | Charles Robert Darwin |
| Date: | 5 June 1881 |
| Classmark: | DAR 165: 44 |
| Letter no: | DCP-LETT-13196 |
| Darwin, C. R. | (4) |
| Gilbert, J. H. | (3) |
| Gilbert, J. H. | (4) |
| Darwin, C. R. | (3) |
