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To Asa Gray   25 June 1874

Summary

Remarks on his work on Pinguicula. Notes its digestive power; it absorbs nutritious matter from leaves and seeds as well as insects.

Author:  Charles Robert Darwin
Addressee:  Asa Gray
Date:  25 June 1874
Classmark:  Archives of the Gray Herbarium, Harvard University (108)
Letter no:  DCP-LETT-9511

To Asa Gray   30 June [1874]

Summary

Thanks for Sarracenia, which is as wonderful as any orchid.

Asks AG to observe Pinguicula.

Has read AG’s semi-theological review [Nation 18 (1874): 348–51] with interest

and has obtained the book [C. Hodge, What is Darwinism? (1874)].

Author:  Charles Robert Darwin
Addressee:  Asa Gray
Date:  30 June [1874]
Classmark:  Archives of the Gray Herbarium, Harvard University (109)
Letter no:  DCP-LETT-9520

To Asa Gray   25 December 1874

Summary

Read AG’s article [see 9753] on longevity and duration of varieties with great interest.

Death of Mrs Hooker.

Hopes Insectivorous plants will be out in the spring.

Author:  Charles Robert Darwin
Addressee:  Asa Gray
Date:  25 Dec 1874
Classmark:  Archives of the Gray Herbarium, Harvard University (110)
Letter no:  DCP-LETT-9779

To Asa Gray   15 April [1867]

Summary

Thanks AG for his trouble about expression queries; wishes he had thought earlier of having them printed.

Is "plodding on" correcting Variation

and getting "a little amusement" from plant experiments. Oxalis is trimorphic like Lythrum.

Is continuing his experiments on seedling vigour.

Has heard hybrid potatoes can be produced by joining halves of different tubers.

Author:  Charles Robert Darwin
Addressee:  Asa Gray
Date:  15 Apr [1867]
Classmark:  Gray Herbarium of Harvard University (97)
Letter no:  DCP-LETT-5442

To Asa Gray   8 August [1867]

Summary

Thanks AG for sending W. M. Canby’s letter on Dionaea. Although already familiar with the facts concerning the secretions, the letter "fires me up to complete and publish on Drosera, Dionæa, etc."

Author:  Charles Robert Darwin
Addressee:  Asa Gray
Date:  8 Aug [1867]
Classmark:  J. L. Gray ed. 1893, 2: 557
Letter no:  DCP-LETT-5602A

To Asa Gray   16 October [1867]

Summary

Sends sheets of first volume of Variation.

Transport of seeds in locust dung.

Pangenesis will be called "a mad dream".

Author:  Charles Robert Darwin
Addressee:  Asa Gray
Date:  16 Oct [1867]
Classmark:  Gray Herbarium of Harvard University (95)
Letter no:  DCP-LETT-5649

To Asa Gray   9 February [1868]

Summary

Asks that Gray forward a parcel to J. T. Rothrock. Variation is selling well. Nearly all chapters written before Origin was published.

Author:  Charles Robert Darwin
Addressee:  Asa Gray
Date:  9 Feb [1868]
Classmark:  William Patrick Watson (dealer) (catalogue 19, 2013)
Letter no:  DCP-LETT-5851F

To Asa Gray   8 May [1868]

Summary

AG’s review of Variation [Nation 6 (1868): 234–6] very good.

CD’s fondness for Pangenesis; although an "infant cherished by few", CD expects it to have a long life.

Author:  Charles Robert Darwin
Addressee:  Asa Gray
Date:  8 May [1868]
Classmark:  Gray Herbarium of Harvard University (94)
Letter no:  DCP-LETT-6167

To Asa Gray   15 August [1868]

Summary

AG’s coming visit to England.

Hooker’s Presidency of BAAS.

A month at the Isle of Wight has done almost nothing for CD.

Author:  Charles Robert Darwin
Addressee:  Asa Gray
Date:  15 Aug [1868]
Classmark:  Gray Herbarium of Harvard University (98)
Letter no:  DCP-LETT-6316

To Asa Gray   1 June [1869]

Summary

Thanks for answers about expression.

Is going to N. Wales to recover after his riding accident.

New edition of Origin.

French edition of Orchids.

Author:  Charles Robert Darwin
Addressee:  Asa Gray
Date:  1 June [1869]
Classmark:  Gray Herbarium of Harvard University (86a)
Letter no:  DCP-LETT-6767

To Asa Gray   15 March [1870]

Summary

The "man-essay" [Descent] is "very interesting but very difficult".

Cat-like behaviour in dogs.

Thanks for information from Louis Agassiz;

wishes he could feel he deserves what Alexander Agassiz says of him.

Author:  Charles Robert Darwin
Addressee:  Asa Gray
Date:  15 Mar [1870]
Classmark:  Gray Herbarium of Harvard University (91)
Letter no:  DCP-LETT-7132

To Asa Gray   7 December 1870

Summary

Believes AG’s cases of incipient dimorphism are due to mere variability. Has found examples in Nolana and Amsinckia; believes such variation is the basis for the development of dimorphism. Was unaware of variations in Phlox.

Sensitivity of Drosera and Dionaea.

Author:  Charles Robert Darwin
Addressee:  Asa Gray
Date:  7 Dec 1870
Classmark:  Gray Herbarium of Harvard University (90)
Letter no:  DCP-LETT-7388

To Asa Gray   5 February [1871]

Summary

Sends questions on expressions of Laura Bridgman.

Has finished Descent. Believes that parts, like that on moral sense, will aggravate AG.

Working on an essay on expression.

Author:  Charles Robert Darwin
Addressee:  Asa Gray
Date:  5 Feb [1871]
Classmark:  Gray Herbarium of Harvard University (86)
Letter no:  DCP-LETT-7476

To Asa Gray   16 July [1871]

Summary

CD’s sons, George and Francis, are to visit the U. S. Can AG supply any letters of introduction?

Author:  Charles Robert Darwin
Addressee:  Asa Gray
Date:  16 July [1871]
Classmark:  Gray Herbarium of Harvard University (101)
Letter no:  DCP-LETT-7867

To Asa Gray   15 January 1872

Summary

Questions AG on earthworm activity in North America and would welcome information from northern Canada if AG has a correspondent there.

Author:  Charles Robert Darwin
Addressee:  Asa Gray
Date:  15 Jan 1872
Classmark:  Archives of the Gray Herbarium, Harvard University (99)
Letter no:  DCP-LETT-8158

To Asa Gray   8 July [1872]

Summary

Thanks for AG’s book, How plants behave [see 8363].

Is correcting proofs of Expression.

Author:  Charles Robert Darwin
Addressee:  Asa Gray
Date:  8 July [1872]
Classmark:  Archives of the Gray Herbarium of Harvard University (107)
Letter no:  DCP-LETT-8402

To Asa Gray   22 October 1872

Summary

Spiralling of tendrils.

Has worked hard on Drosera.

Is interested in tracing the "nerves" of Dionaea which follow the vascular bundles. Finds he can paralyse half of the leaf by pricking it at a certain point.

Wishes AG to carry out two experiments on D. filiformis.

Has received AG’s Dubuque address [Am. J. Sci. 3d ser. 4 (1872): 282–98].

Author:  Charles Robert Darwin
Addressee:  Asa Gray
Date:  22 Oct 1872
Classmark:  Gray Herbarium of Harvard University (100)
Letter no:  DCP-LETT-8568

To Asa Gray   8 January 1873

Summary

Has received, through AG, a letter on Dionaea [from W. M. Canby] which has greatly interested him. CD asks AG to question his correspondent on whether it catches large or small insects.

Mary Treat will observe Drosera filiformis.

Author:  Charles Robert Darwin
Addressee:  Asa Gray
Date:  8 Jan 1873
Classmark:  Archives of the Gray Herbarium, Harvard University (102)
Letter no:  DCP-LETT-8728

To Asa Gray   11 March [1873]

Summary

Astonished by Agassiz’s argument; has sent AG’s memorandum to Nature [see 8786].

Is working on cross- and self-fertilising plants and has temporarily stopped work on Drosera.

Author:  Charles Robert Darwin
Addressee:  Asa Gray
Date:  11 Mar [1873]
Classmark:  Archives of the Gray Herbarium, Harvard University (106)
Letter no:  DCP-LETT-8806

To Asa Gray   3 June [1874]

Summary

CD is deeply pleased by AG’s article on him in Nature [10 (1874): 79–81].

Is preparing book on "Drosera and Co." for the printers. Reports observations on digestion in Drosera and Pinguicula.

Author:  Charles Robert Darwin
Addressee:  Asa Gray
Date:  3 June [1874]
Classmark:  Archives of the Gray Herbarium, Harvard University (103)
Letter no:  DCP-LETT-9480
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Darwin, C. R.[X]
Gray, Asa[X]
Gray, J. L. (1)
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