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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

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

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

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

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 Francis Darwin to J. H. Gilbert   8 June 1876

Summary

Asks about constituents of burnt soil.

Author:  Francis Darwin
Addressee:  Joseph Henry Gilbert
Date:  8 June 1876
Classmark:  Rothamsted Research (GIL13)
Letter no:  DCP-LETT-10535F

From J. H. Gilbert to Francis Darwin   10 June 1876

Summary

On burnt soils.

Author:  Joseph Henry Gilbert
Addressee:  Francis Darwin
Date:  10 June 1876
Classmark:  Rothamsted Research (GIL13)
Letter no:  DCP-LETT-10535G

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

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

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

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

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
Letter no:  DCP-LETT-13087

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

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   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

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
Document type
letter (20)
Correspondent
Date
1869 (1)
1875 (3)
1876 (7)
1881 (7)
1882 (2)
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