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From G. H. Darwin   20 August 1875

Summary

CD’s suspicions that Legrain falsified experiments on interbred rabbits are like second sight. Has sent a copy of the letter to A. H. Huth.

Henry Sidgwick and A. J. Balfour are "spiritualising" again.

Author:  George Howard Darwin
Addressee:  Charles Robert Darwin
Date:  20 Aug 1875
Classmark:  DAR 210.2: 47
Letter no:  DCP-LETT-10129

From G. H. Darwin   12 October 1875

Summary

Sends an article for CD’s opinion.

Has finished an account of the globes for the Philosophical Magazine ["On maps of the world", 50 (1875): 431–44].

His poor health has interfered with his pitch experiments.

Author:  George Howard Darwin
Addressee:  Charles Robert Darwin
Date:  12 Oct 1875
Classmark:  DAR 210.2: 48
Letter no:  DCP-LETT-10191

From G. H. Darwin   [26 October 1875]

Summary

Has sent a copy [of his article on cousin marriage] to Hermann Müller.

Problem he is now working on is a tough nut: "It does not do what [James Clerk] Maxwell said it wd or ought to do".

Author:  George Howard Darwin
Addressee:  Charles Robert Darwin
Date:  [26 Oct 1875]
Classmark:  DAR 210.2: 49
Letter no:  DCP-LETT-10226

From G. H. Darwin   [after 28 March 1876]

Summary

Personal news – is unwell.

Mentions "Twin-papers" ["Short notes on heredity, etc., in twins", J. Anthropol. Inst. 5 (1876): 324–9] sent by Galton.

Author:  George Howard Darwin
Addressee:  Charles Robert Darwin
Date:  [after 28 Mar 1876]
Classmark:  DAR 210.2: 50
Letter no:  DCP-LETT-10242

From G. H. Darwin   [after 8 January 1876]

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Summary

Provides CD with a method of obtaining a numerical ratio that expresses the superiority in heights of crossed plants to self-fertilised plants.

Author:  George Howard Darwin
Addressee:  Charles Robert Darwin
Date:  [after 8 Jan 1876]
Classmark:  DAR 77: 144–5
Letter no:  DCP-LETT-10349

From G. H. Darwin   25 April 1876

Summary

Is elated by his work on the alteration in the earth’s axis and the displacement of the poles. [See 10689.]

Author:  George Howard Darwin
Addressee:  Charles Robert Darwin
Date:  25 Apr 1876
Classmark:  DAR 210.2: 51
Letter no:  DCP-LETT-10472

From G. H. Darwin   1 May 1876

Summary

Writes of his "geo-mathematical" work.

Author:  George Howard Darwin
Addressee:  Charles Robert Darwin
Date:  1 May 1876
Classmark:  DAR 210.2: 52
Letter no:  DCP-LETT-10489

From G. H. Darwin   31 May 1876

Summary

His paper on the alterations of the poles and changes in level of continents is in shape.

Sends Cambridge news.

Author:  George Howard Darwin
Addressee:  Charles Robert Darwin
Date:  31 May 1876
Classmark:  DAR 210.2: 53
Letter no:  DCP-LETT-10519

From G. H. Darwin   1 June 1876

Summary

Greatly excited by the astronomical implications of his work.

Author:  George Howard Darwin
Addressee:  Charles Robert Darwin
Date:  1 June 1876
Classmark:  DAR 210.2: 54
Letter no:  DCP-LETT-10522

From G. H. Darwin   20 June 1876

Summary

Comments on an address by William Thomson (‘On the rigidity of the earth’?), which is about the same problem that GHD is working on. Is confident Thomson has overlooked some points.

Author:  George Howard Darwin
Addressee:  Charles Robert Darwin
Date:  20 June 1876
Classmark:  DAR 210.2: 55
Letter no:  DCP-LETT-10541

From G. H. Darwin   [27? November 1876]

Summary

Sends W. Thomson’s complimentary opinion of his paper "On the influence of geological changes on the earth’s axis" [Philos. Trans. R. Soc. Lond. 167 (1877): 271–312].

Author:  George Howard Darwin
Addressee:  Charles Robert Darwin
Date:  [27? Nov 1876]
Classmark:  DAR 210.2: 56
Letter no:  DCP-LETT-10689

From G. H. Darwin   4 March 1880

Summary

Writes on family matters and researches.

Mentions construction of a pendulum

and completion of a paper he will send to the Royal Society.

Author:  George Howard Darwin
Addressee:  Charles Robert Darwin
Date:  4 Mar 1880
Classmark:  DAR 210.2: 82
Letter no:  DCP-LETT-12510

From G. H. Darwin   6 March 1880

Summary

Has sent off paper to the Royal Society

and begun work on a new problem which he feels contains the meaning of Bode’s Law, concerning the mean distances of the planets from the sun. There are mathematical difficulties, however, which he may be unable to surmount.

Will get to work on the pendulum next week.

Author:  George Howard Darwin
Addressee:  Charles Robert Darwin
Date:  6 Mar 1880
Classmark:  DAR 210.2: 83
Letter no:  DCP-LETT-12518

From G. H. Darwin   28 May 1880

Summary

Writes of a Mrs Noel, who is annoyed with CD’s neglect of Erasmus Darwin’s brother, W[illiam] A[lvey] D[arwin I], [in Erasmus Darwin].

Author:  George Howard Darwin
Addressee:  Charles Robert Darwin
Date:  28 May 1880
Classmark:  DAR 210.2: 84
Letter no:  DCP-LETT-12617

From G. H. Darwin   [July 1880?]

Summary

Unable to acquire pure trypsin. W. F. Kühne is probably the only man who had it. Will send an almost pure sample out of which A. S. Lea makes pancreatic ferment.

Author:  George Howard Darwin
Addressee:  Charles Robert Darwin
Date:  [July 1880?]
Classmark:  DAR 64.2: 94
Letter no:  DCP-LETT-12644

From G. H. Darwin   27 July 1880

Summary

Asks CD’s advice on how to answer a letter requesting his endorsement of Wrigley, his former teacher at Clapham School.

Author:  George Howard Darwin
Addressee:  Charles Robert Darwin
Date:  27 July 1880
Classmark:  DAR 64.2: 94; DAR 210.2: 85
Letter no:  DCP-LETT-12668

From G. H. Darwin   9 October 1880

Summary

Is having a trough made to try experiments [on ripple-marks].

Author:  George Howard Darwin
Addressee:  Charles Robert Darwin
Date:  9 Oct 1880
Classmark:  DAR 210.2: 86
Letter no:  DCP-LETT-12747

From G. H. Darwin   19 November 1880

Summary

Comments on CD’s book [Movement in plants].

Continues with his experiments with ripple-marks.

Is in despair about his astronomy.

Author:  George Howard Darwin
Addressee:  Charles Robert Darwin
Date:  19 Nov 1880
Classmark:  DAR 210.2: 87
Letter no:  DCP-LETT-12828

From G. H. Darwin   [9 June 1881]

Summary

Has nearly finished his mathematical paper.

Is not sure when he will go to Patterdale.

Author:  George Howard Darwin
Addressee:  Charles Robert Darwin
Date:  [9 June 1881]
Classmark:  DAR 210.2: 88
Letter no:  DCP-LETT-13199

From G. H. Darwin   21 August 1881

Summary

Sends CD information he had requested on W. Graham.

Author:  George Howard Darwin
Addressee:  Charles Robert Darwin
Date:  21 Aug 1881
Classmark:  DAR 210.2: 89
Letter no:  DCP-LETT-13294
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letter (108)
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Darwin, C. R.[X]
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