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To J. D. Hooker   25 March [1878]

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Summary

CD and Frank think they have proved that function of plant sleep is to protect leaves from injury by chilling radiation. Requests plants for experiment to determine whether underside of leaf is hardier than upper.

Author:  Charles Robert Darwin
Addressee:  Joseph Dalton Hooker
Date:  25 Mar [1878]
Classmark:  DAR 95: 469–70
Letter no:  DCP-LETT-11443

To J. D. Hooker   28 March [1878]

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Summary

Studying geotropism.

Experiments using exposure to frost to study nyctitropism are difficult to perform because species vary in frost tolerance.

Author:  Charles Robert Darwin
Addressee:  Joseph Dalton Hooker
Date:  28 Mar [1878]
Classmark:  DAR 95: 471–2
Letter no:  DCP-LETT-11452

From J. D. Hooker   9 June 1878

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Summary

JDH’s scheme for lowering F.R.S. fees by creating a fund through membership subscription.

Author:  Joseph Dalton Hooker
Addressee:  Charles Robert Darwin
Date:  9 June 1878
Classmark:  DAR 104: 109–10
Letter no:  DCP-LETT-11547

From J. D. Hooker   20 February – 16 [March] 1848

Summary

Though correspondence has never ebbed so low, CD is constantly in his thoughts.

Observations on cheetahs used as domesticated hunting animals.

Finds geographical barriers sometimes separate species, but also finds species that remain separate where there are no barriers to migration.

Colour "individuates" isolated animal species.

Plains and alpine animal distribution show altitude not strictly analogous to latitude.

Impact of timber cutting on climate has led to extinction of crocodiles.

Will discuss coal formation in letter to Edward Forbes.

CD often asked whether isolated mountains in southern latitudes had closely allied representatives of Arctic and north temperate plants; JDH has found a representative barberry.

Making for Darjeeling via Calcutta.

Author:  Joseph Dalton Hooker
Addressee:  Charles Robert Darwin
Date:  20 Feb – 16 [Mar] 1848
Classmark:  Royal Botanic Gardens, Kew (India letters 1847–51: 52–4 JDH/1/10)
Letter no:  DCP-LETT-1158

To J. D. Hooker   1 July 1878

Summary

JDH may put CD’s name down for £200 for the proposed fund.

Does JDH have a plant of Porlieria hygrometrica he could lend to CD?

Author:  Charles Robert Darwin
Addressee:  Joseph Dalton Hooker
Date:  1 July 1878
Classmark:  Royal Botanic Gardens, Kew (Royal Society Letters, c. 1875 – c. 1905, JDH/2/18: f.36)
Letter no:  DCP-LETT-11581

From J. D. Hooker   2 July 1878

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Summary

JDH details the subscription fund’s finances.

Has finished lecture for Royal Society on N. American plant distribution.

Author:  Joseph Dalton Hooker
Addressee:  Charles Robert Darwin
Date:  2 July 1878
Classmark:  DAR 104: 111–12
Letter no:  DCP-LETT-11583

To J. D. Hooker   3 July [1878]

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Summary

CD contributes £200 to JDH’s Royal Society fund.

Author:  Charles Robert Darwin
Addressee:  Joseph Dalton Hooker
Date:  3 July [1878]
Classmark:  DAR 95: 473
Letter no:  DCP-LETT-11588

From J. D. Hooker   31 July 1878

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Summary

Burdened with Anniversary Address to the Royal Society.

Quips that even Huxley is running out of speeches.

Author:  Joseph Dalton Hooker
Addressee:  Charles Robert Darwin
Date:  31 July 1878
Classmark:  DAR 104: 114
Letter no:  DCP-LETT-11636

To J. D. Hooker   3 October [1878]

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Summary

Wants Oxalis specimen named; is fascinated by cotyledonary movements of the genus.

Author:  Charles Robert Darwin
Addressee:  Joseph Dalton Hooker
Date:  3 Oct [1878]
Classmark:  DAR 95: 474
Letter no:  DCP-LETT-11713

From J. D. Hooker   4 October 1878

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Summary

Frank asked to summarise work with CD for use in JDH’s Royal Society address.

Work with A. Gray shows Colorado plants closer to Altai than to E. or W. America.

Work with J. Ball shows Moroccan plants very distinct from nearby Canaries.

JDH on Royal Commission to Paris Exhibition.

Author:  Joseph Dalton Hooker
Addressee:  Charles Robert Darwin
Date:  4 Oct 1878
Classmark:  DAR 104: 115–17
Letter no:  DCP-LETT-11714

To J. D. Hooker   5 October [1878]

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Summary

Before JDH discusses flora of Canary Islands CD suggests he read F. B. White’s paper [see 11707], which explains stocking of Atlantic island fauna as due to changed currents during [last, or Miocene] northern glacial period.

Author:  Charles Robert Darwin
Addressee:  Joseph Dalton Hooker
Date:  5 Oct [1878]
Classmark:  DAR 95: 475–6
Letter no:  DCP-LETT-11715

From J. D. Hooker   7 October 1878

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Botanical evidence is against F. B. White’s origin of St Helena fauna. JDH holds flora is S. African. Since plants must arrive before insects, if fauna is Palearctic then flora survived glacial period. Flora not Miocene since old and relic orders are absent. Suggests S. African west coastal mountains as insects’ origin.

Author:  Joseph Dalton Hooker
Addressee:  Charles Robert Darwin
Date:  7 Oct 1878
Classmark:  DAR 104: 118–20
Letter no:  DCP-LETT-11718

To J. D. Hooker   10 May 1848

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Summary

Confident of species theory as result of applying it to cirripede sexual systems.

CD’s opinion of E. Blyth. JDH should meet Blyth, inquire about domesticated varieties, study insular flora, solve coal-plant problem.

Author:  Charles Robert Darwin
Addressee:  Joseph Dalton Hooker
Date:  10 May 1848
Classmark:  DAR 114: 112
Letter no:  DCP-LETT-1174

To J. D. Hooker   14 December [1878]

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Summary

Thanks for JDH’s description of CD’s work in Nature.

Anthony Rich to bequeath his property (over £1100 a year) to CD.

Author:  Charles Robert Darwin
Addressee:  Joseph Dalton Hooker
Date:  14 Dec [1878]
Classmark:  DAR 95: 477–8
Letter no:  DCP-LETT-11794

From J. D. Hooker   14 December 1878

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Congratulates CD on the Anthony Rich bequest.

Sad but relieved to retire as President of the Royal Society.

Describes battle with Treasury over use of an empty house at Kew.

Author:  Joseph Dalton Hooker
Addressee:  Charles Robert Darwin
Date:  14 Dec 1878
Classmark:  DAR 104: 121–4
Letter no:  DCP-LETT-11795

To J. D. Hooker   17 December [1878]

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Summary

Waiting for frost to go so experiments can start again.

Author:  Charles Robert Darwin
Addressee:  Joseph Dalton Hooker
Date:  17 Dec [1878]
Classmark:  DAR 95: 479–80
Letter no:  DCP-LETT-11798

From J. D. Hooker   24 July [1848]

Summary

Brian Hodgson reading CD’s Journal of researches with delight.

Forwarding breeding pamphlets.

JDH recommends P. S. Pallas on degeneration.

CD’s facts on sex in barnacles startling.

Hugh Falconer’s health.

Author:  Joseph Dalton Hooker
Addressee:  Charles Robert Darwin
Date:  24 July [1848]
Classmark:  Royal Botanic Gardens, Kew (India letters 1847–51: 94 JDH/1/10)
Letter no:  DCP-LETT-1193

From J. D. Hooker   13 March 1879

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Summary

Urges Frank to reconsider his refusal of Cambridge Examinership.

Author:  Joseph Dalton Hooker
Addressee:  Charles Robert Darwin
Date:  13 Mar 1879
Classmark:  DAR 104: 125–7
Letter no:  DCP-LETT-11938

To J. D. Hooker   16 March [1879]

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Frank’s reasons for not accepting the Cambridge Examinership.

Author:  Charles Robert Darwin
Addressee:  Joseph Dalton Hooker
Date:  16 Mar [1879]
Classmark:  DAR 95: 481–2
Letter no:  DCP-LETT-11939

From Francis Darwin to J. D. Hooker   17 March 1879

Summary

Frank decides to accept Cambridge nomination for examiner; thanks JDH and Thiselton-Dyer for their encouragement.

Author:  Francis Darwin
Addressee:  Joseph Dalton Hooker
Date:  17 Mar 1879
Classmark:  DAR 95: 483–4
Letter no:  DCP-LETT-11941
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