To J. H. Gilbert 11 August 1875
Summary
Apologises for keeping the tables so long [see 10090]. The results seem extremely curious.
Comments on paper by JHG and J. B. Lawes.
Author: | Charles Robert Darwin |
Addressee: | Joseph Henry Gilbert |
Date: | 11 Aug 1875 |
Classmark: | Rothamsted Research (GIL13) |
Letter no: | DCP-LETT-10115 |
To J. H. Gilbert [before 9 March 1876]
Summary
Thanks for advice concerning preparation of soil for experiments. Will order the salts. Asks about burning soil or washing it with acid.
Thanks for invitation. His son [Francis] would like to inspect JHG’s plots.
Author: | Charles Robert Darwin |
Addressee: | Joseph Henry Gilbert |
Date: | [before 9 Mar 1876] |
Classmark: | Rothamsted Research (GIL13) |
Letter no: | DCP-LETT-10376 |
To J. H. Gilbert 16 February 1876
Summary
Describes self- and cross-fertilisation experiments.
Asks JHG’s advice on setting up an experiment designed to test whether the cause of variation in cultivated plants lies in different substances absorbed from the soil when absorption is not interfered with by other plants in a state of nature. Can JHG suggest how he can get soil free of all the substances which plants naturally absorb?
Author: | Charles Robert Darwin |
Addressee: | Joseph Henry Gilbert |
Date: | 16 Feb 1876 |
Classmark: | Rothamsted Research (GIL13) |
Letter no: | DCP-LETT-10399 |
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 |
To J. H. Gilbert 12 January 1882
Summary
Quantity of nitrogen in castings surprises CD.
Comments on papers: [J. B. Lawes and J. H. Gilbert, "Results of experiments on mixed herbage, pt 1", Philos. Trans. R. Soc. Lond. 171 (1880): 289–416; Gilbert, Lawes and M. T. Masters, "pt 2: The botanical results", Philos. Trans. R. Soc. Lond. 173 (1882): 1181–413].
Has never made sections to see how deep worms burrow – five or six feet is probable. Wishes the problem had arisen when he made his observations.
Author: | Charles Robert Darwin |
Addressee: | Joseph Henry Gilbert |
Date: | 12 Jan 1882 |
Classmark: | Rothamsted Research (GIL13) |
Letter no: | DCP-LETT-13616 |
To Joseph Henry Gilbert 3 June [1869]
Summary
Declines invitation.
Author: | Charles Robert Darwin |
Addressee: | Joseph Henry Gilbert |
Date: | 3 June [1869] |
Classmark: | Rothamsted Research (GIL9.6) |
Letter no: | DCP-LETT-6773 |
From J. H. Gilbert 24 July 1875
Summary
Thiselton-Dyer has asked on CD’s behalf for results of experiments at Rothamsted on herbage of permanent meadow land. Sends report and tables of botanical analysis.
Author: | Joseph Henry Gilbert |
Addressee: | Charles Robert Darwin |
Date: | 24 July 1875 |
Classmark: | DAR 165: 42 |
Letter no: | DCP-LETT-10090 |
From J. H. Gilbert 31 December 1875
Summary
Discusses fairy rings.
Author: | Joseph Henry Gilbert |
Addressee: | Charles Robert Darwin |
Date: | 31 Dec 1875 |
Classmark: | Rothamsted Research (GIL13) |
Letter no: | DCP-LETT-10331F |
From J. H. Gilbert 6 January 1876
Summary
Thanks for a copy of Insectivorous Plants.
Author: | Joseph Henry Gilbert |
Addressee: | Charles Robert Darwin |
Date: | 6 Jan 1876 |
Classmark: | Rothamsted Research (GIL13) |
Letter no: | DCP-LETT-10346F |
From J. H. Gilbert 4 March 1876
Summary
Discusses in detail how to prepare for experimental purposes a soil that lacks nutrients.
Author: | Joseph Henry Gilbert |
Addressee: | Charles Robert Darwin |
Date: | 4 Mar 1876 |
Classmark: | Rothamsted Research (GIL13) |
Letter no: | DCP-LETT-10414F |
From J. H. Gilbert 9 March 1876
Summary
Sends advice on preparing and washing soil in preparation for CD’s experiments.
Author: | Joseph Henry Gilbert |
Addressee: | Charles Robert Darwin |
Date: | 9 Mar 1876 |
Classmark: | Rothamsted Research (GIL13) |
Letter no: | DCP-LETT-10416G |
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 |
From J. H. Gilbert 9 January 1882
Summary
Thanks CD for Earthworms.
Discusses the problem of accounting for difference between nitrogen in permanent grassland and ordinary arable soil. Finds castings of earthworms rich in nitrogen. Asks CD if his observations enable him to explain the source. If from below top-soil, it would be a considerable manuring.
Author: | Joseph Henry Gilbert |
Addressee: | Charles Robert Darwin |
Date: | 9 Jan 1882 |
Classmark: | DAR 165: 45 |
Letter no: | DCP-LETT-13605 |
Darwin, C. R. | (9) |
Gilbert, J. H. | (9) |