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To Hubert Airy   10 [December] 1871

Summary

Discusses movement of ears and contraction of the platysma.

Discusses phyllotaxy, citing work of Carl Nägeli and Chauncey Wright.

Author:  Charles Robert Darwin
Addressee:  Hubert Airy
Date:  10 [Dec] 1871
Classmark:  DAR 143: 16
Letter no:  DCP-LETT-8060

To Hubert Airy?   9 June [1872?]

Summary

Agrees to read paper; warns he lacks mathematical knowledge.

Author:  Charles Robert Darwin
Addressee:  Hubert Airy
Date:  9 June [1872?]
Classmark:  American Philosophical Society (Mss.B.D25.408)
Letter no:  DCP-LETT-8377

To Hubert Airy   24 August 1872

Summary

CD’s son Leonard of the Royal Engineers has applied to Sir George Biddell Airy to be an observer on the Venus Expedition. Leonard failed to mention his qualifications, which CD now relates with the request that HA draw them to his father’s attention.

Author:  Charles Robert Darwin
Addressee:  Hubert Airy
Date:  24 Aug 1872
Classmark:  CUL: Royal Greenwich Observatory archives 6/273 (section 3–4: 348–9)
Letter no:  DCP-LETT-8486A

To Hubert Airy   [before 21 January 1873]

Summary

Sends HA’s paper ["On leaf arrangement"] with a supporting note [from CD] to Royal Society.

Author:  Charles Robert Darwin
Addressee:  Hubert Airy
Date:  [before 21 Jan 1873]
Classmark:  Cambridge University Library (MS. Add. 7656: RS899)
Letter no:  DCP-LETT-8744

To Hubert Airy   27 January [1876?]

Summary

Agrees to aid HA in applying for membership in a society.

Author:  Charles Robert Darwin
Addressee:  Hubert Airy
Date:  27 Jan [1876?]
Classmark:  DAR 143: 17
Letter no:  DCP-LETT-10369

To Hubert Airy   5 April [1871]

Summary

Discusses loss of voluntary movement of ears in man and monkey.

Author:  Charles Robert Darwin
Addressee:  Hubert Airy
Date:  5 Apr [1871]
Classmark:  DAR 143: 15
Letter no:  DCP-LETT-7659

From Hubert Airy   20 September 1872

Summary

Disputes Thomas Meehan’s observations on the hardiness of exposed buds, and believes bud-scales are for the protection of the bud-leaves. Reiterates his opinion that the phyllotaxy of a plant is determined by causes acting when the leaves are crowded into close contact. Attempts to explain how a different phyllotaxy on the upper and lower parts of the same shoot could have arisen.

Author:  Hubert Airy
Addressee:  Charles Robert Darwin
Date:  20 Sept 1872
Classmark:  DAR 159: 21
Letter no:  DCP-LETT-8527

From Hubert Airy   24 September 1872

Summary

Thanks for letter, in which CD cited [Anton] Kerner’s alpine observations.

Describes with diagrams the curious disposition of leaves on some Acacia twigs, and points out that his theory should account for these anomalies as well as normal cases.

Author:  Hubert Airy
Addressee:  Charles Robert Darwin
Date:  24 Sept 1872
Classmark:  DAR 159: 22
Letter no:  DCP-LETT-8532

From Hubert Airy   3 December 1872

Summary

Discusses works lent him by CD: Candolle, Kerner, Braun, Sachs, and CD’s own notes on relative positions of leaves. Plans paper on subject for Royal Society.

Just appointed medical inspector under local government board.

Author:  Hubert Airy
Addressee:  Charles Robert Darwin
Date:  3 Dec 1872
Classmark:  DAR 159: 23
Letter no:  DCP-LETT-8657

From Hubert Airy   3 January 1873

Summary

HA’s paper on leaf arrangement is almost ready; asks CD to communicate it to the Royal Society. Seeks permission to quote from CD’s notes.

Author:  Hubert Airy
Addressee:  Charles Robert Darwin
Date:  3 Jan 1873
Classmark:  DAR 159: 24
Letter no:  DCP-LETT-8720

From Hubert Airy   21 January 1873

Summary

Has sent phyllotaxy paper to G. G. Stokes with the letter from CD to show credentials.

Will not have time to read new Sachs edition CD offered.

Thanks for CD’s sponsorship of paper [Proc. R. Soc. Lond. 21 (1873): 176–9].

Author:  Hubert Airy
Addressee:  Charles Robert Darwin
Date:  21 Jan 1873
Classmark:  DAR 159: 25
Letter no:  DCP-LETT-8745

From Hubert Airy   17 March 1873

Summary

Thanks for congratulations on appearance of abstract of HA’s paper [Nature 7 (1873): 343–4].

Explains again his theory of "contraction with twist" by which compact buds and a spiral phyllotaxy have evolved. Explains how the peculiar phyllotaxy of the teasel is explicable by this process of "condensation".

Author:  Hubert Airy
Addressee:  Charles Robert Darwin
Date:  17 Mar 1873
Classmark:  DAR 159: 26
Letter no:  DCP-LETT-8812

From Hubert Airy   26 [September–November 1873]

Summary

The Royal Society referees have rejected HA’s phyllotaxy paper, and it will not be printed in Philosophical Transactions. HA is not sorry for he has found new facts which limit the applicability of his views. Now believes that the original leaf arrangement was not necessarily always two-ranked but rather that existing arrangements have developed from a variety of forms with differing numbers of leaf-ranks.

Author:  Hubert Airy
Addressee:  Charles Robert Darwin
Date:  26 [Sept-Nov] 1873
Classmark:  DAR 159: 31
Letter no:  DCP-LETT-9073

From Hubert Airy   7 December 1873

Summary

Illustrates, with reference to different species of Gasteria, the role of twisting in the development of leaf arrangement.

Author:  Hubert Airy
Addressee:  Charles Robert Darwin
Date:  7 Dec 1873
Classmark:  DAR 159: 27
Letter no:  DCP-LETT-9175

From Hubert Airy   8 January 1874

Summary

W. J. Beal’s paper ["Phyllotaxis of cones", Am. Nat. 7 (1873): 449–53] shows incompleteness of HA’s theory, but does not invalidate his basic principles on origin of leaf arrangement or the broad applicability of the theory.

Author:  Hubert Airy
Addressee:  Charles Robert Darwin
Date:  8 Jan 1874
Classmark:  DAR 159: 28
Letter no:  DCP-LETT-9232

From Hubert Airy   13 March 1874

Summary

Has rewritten paper on leaf arrangement after criticism by Royal Society referees. Has found new factor influencing leaf arrangement, i.e., spontaneous variability in the number of vertical leaf-ranks.

Author:  Hubert Airy
Addressee:  Charles Robert Darwin
Date:  13 Mar 1874
Classmark:  DAR 159: 29
Letter no:  DCP-LETT-9357

From Hubert Airy   2 May 1876

Summary

On his new paper for Royal Society on a point of leaf arrangement. Asks CD to communicate it and "gives some details of its contents", e.g., recorded observations of changing leaf-order on individual specimens.

Comments on a paper by George Henslow ["Helianthus tuberosus", Trans. Linn. Soc. Lond. 26 (1876): 647].

Author:  Hubert Airy
Addressee:  Charles Robert Darwin
Date:  2 May 1876
Classmark:  DAR 159: 30
Letter no:  DCP-LETT-10490

From Hubert Airy   3 April 1871

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Summary

Comments on discussion of residual organs in Descent [ch. 1].

Describes his ability to contract the platysma myoides at will.

Suggests reason for loss of voluntary movement of ears in men and monkeys.

Author:  Hubert Airy
Addressee:  Charles Robert Darwin
Date:  3 Apr 1871
Classmark:  DAR 87: 37–8
Letter no:  DCP-LETT-7657

From Hubert Airy   9 December 1871

Summary

Reply to CD’s letter of 5 Apr 1871 [7659], in which he asked HA for further details on when and how platysma myoides contracts.

Replies to CD’s questions about sources on leaf arrangement.

Gives news of speech and paper about CD.

Author:  Hubert Airy
Addressee:  Charles Robert Darwin
Date:  9 Dec 1871
Classmark:  DAR 159: 13
Letter no:  DCP-LETT-8101

From Hubert Airy   12 December 1871

Summary

Thanks for letter and reference to Nägeli’s observations on leaf arrangement in the bud.

Author:  Hubert Airy
Addressee:  Charles Robert Darwin
Date:  12 Dec 1871
Classmark:  DAR 159: 14b (fragile, damaged)
Letter no:  DCP-LETT-8105
Document type
letter (27)
Author
Addressee
Correspondent
Airy, Hubert[X]
Darwin, C. R.[X]
Date
1871 (5)
1872 (12)
1873 (6)
1874 (2)
1876 (2)
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