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From J. D. Hooker   20 October 1873

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Summary

Describes work on Nepenthes – more difficult than Drosera.

Has written to Dublin for a Drosophyllum.

Author:  Joseph Dalton Hooker
Addressee:  Charles Robert Darwin
Date:  20 Oct 1873
Classmark:  DAR 103: 171–2
Letter no:  DCP-LETT-9102

To J. D. Hooker   [before 20 October 1873?]

Summary

Lists plants in which he is interested, including Neptunia and Mimosa species.

Do any strictly tropical plants have glaucous leaves?

Asks for observations on irritable plants.

Author:  Charles Robert Darwin
Addressee:  Joseph Dalton Hooker
Date:  [before 20 Oct 1873?]
Classmark:  Royal Botanic Gardens Kew (JDH/3/6 Insectivorous plants 1873-8 f.39b)
Letter no:  DCP-LETT-9107

To J. D. Hooker   23 October [1873]

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Summary

Neptunia is evidently a hopeless case.

Good news that fluid of Nepenthes is acid.

No discovery ever gave him more pleasure than proving a true act of digestion in Drosera.

Has become profoundly interested in Desmodium. Asks whether Frank [Darwin] can look over the whole dried collection of the genus.

Has JDH any seed of Lathyrus nissolia?

Author:  Charles Robert Darwin
Addressee:  Joseph Dalton Hooker
Date:  23 Oct [1873]
Classmark:  DAR 95: 282–3
Letter no:  DCP-LETT-9108

To J. D. Hooker   [before 25 October 1873]

Summary

Suggests experiments to try [with Nepenthes].

Asks JDH to test whether cabbage seeds and peas exposed to the ferment germinate.

Cancel: same as 9523.

Author:  Charles Robert Darwin
Addressee:  Joseph Dalton Hooker
Date:  [before 25 Oct 1873]
Classmark:  DAR 151: 330
Letter no:  DCP-LETT-9112

From J. D. Hooker   25 October 1873

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Summary

Describes his experiments on Nepenthes; finds action analogous to that in Drosera.

Author:  Joseph Dalton Hooker
Addressee:  Charles Robert Darwin
Date:  25 Oct 1873
Classmark:  DAR 103: 175
Letter no:  DCP-LETT-9113

To J. D. Hooker   26 October [1873]

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Summary

Extremely glad to hear of the aggregation in Nepenthes glands. Advises on experimenting with cubes of albumen – gives sizes, also suggests cubes of roast meat. Thanks for analyses of secretion of Nepenthes.

Asks for cutting of Acacia farnesiana.

Longs to examine a species of Desmodium with three leaflets. Has asked Frank [Darwin] to look for species of Desmodium with tendrils.

Author:  Charles Robert Darwin
Addressee:  Joseph Dalton Hooker
Date:  26 Oct [1873]
Classmark:  DAR 95: 284–5
Letter no:  DCP-LETT-9114

From J. D. Hooker   29 October 1873

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Summary

Sends plant specimens.

He and Thiselton-Dyer, working on with Nepenthes, have independently found the spiral vessels going to the gland. CD’s view that the glands are secretory organs is suggestive. When Nepenthes is as much done as CD wants,

he will turn to Cephalotus and Sarracenia.

Author:  Joseph Dalton Hooker
Addressee:  Charles Robert Darwin
Date:  29 Oct 1873
Classmark:  DAR 103: 176–7
Letter no:  DCP-LETT-9116

To J. D. Hooker   30 October [1873]

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Summary

Thanks for leaves. His notes on them will be of greatest service.

He cannot distinguish some Eucalypti from Acacia. Sends specimens, with numbers, for JDH to name.

Acacia farnesiana branches arrived withered, but saw enough to make him wish to examine the plant.

Has thought of some troublesome experiments for Drosophyllum.

Encloses remarks [missing] by Searles Wood, with which CD disagrees, about a new and strongly marked variety transmitting its characters.

The competition of better adapted forms seems to CD a sufficient explanation [for extinction].

Author:  Charles Robert Darwin
Addressee:  Joseph Dalton Hooker
Date:  30 Oct [1873]
Classmark:  DAR 95: 286–9
Letter no:  DCP-LETT-9117

To J. D. Hooker   31 October 1873

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Summary

On Nepenthes.

Asks JDH, if he publishes, to mention CD’s work on digestive powers of Drosera so that charges of plagiarism will not be made against CD later when he publishes.

Describes at length his observations on the movements of Desmodium.

Author:  Charles Robert Darwin
Addressee:  Joseph Dalton Hooker
Date:  31 Oct 1873
Classmark:  DAR 95: 300–3
Letter no:  DCP-LETT-9118

To J. D. Hooker   [3 September 1845]

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Summary

Condolences on JDH’s grandfather’s death.

When his wife can move, they will go to Staffordshire.

Returns some books; would like to see copy of Kosmos [by Alexander von Humboldt]. Would be proud owner of JDH’s work [Flora Antarctica (1844–7)].

Author:  Charles Robert Darwin
Addressee:  Joseph Dalton Hooker
Date:  [3 Sept 1845]
Classmark:  DAR 114: 40
Letter no:  DCP-LETT-912

From J. D. Hooker   [1 November 1873]

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Summary

Sends leaves and names by post.

Is writing everywhere for Drosophyllum.

Is deeply interested in Desmodium.

Had no intention of publishing on Nepenthes, the experiments were solely for CD’s "eating". Will continue with egg and raw meat experiments. Asks for advice on how to prove fluid is secreted by the glands.

Searles Wood’s letter is confused and would deny atavism if his principles were accepted.

Author:  Joseph Dalton Hooker
Addressee:  Charles Robert Darwin
Date:  [1 Nov 1873]
Classmark:  DAR 103: 178–80, DAR 209.12: 3
Letter no:  DCP-LETT-9123

To J. D. Hooker   3 November [1873]

Summary

Discusses experiments and observations on pitchers [of Nepenthes]. Suggests procedures for JDH to follow.

Any plant of any family with a terminal or with any lateral leaflets greatly reduced would be interesting to CD for studying spontaneous movements.

Has not received Eucalyptus or Acacia plants from Rollisson.

Author:  Charles Robert Darwin
Addressee:  Joseph Dalton Hooker
Date:  3 Nov [1873]
Classmark:  Royal Botanic Garden Kew (JDH/3/6 Insectivorous plants 1873–8 ff. 2–3 and 39a)
Letter no:  DCP-LETT-9130

From J. D. Hooker   4 November 1873

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Summary

Has time only to thank CD for the invaluable hints.

Encloses Lathyrus nissolia seeds.

Author:  Joseph Dalton Hooker
Addressee:  Charles Robert Darwin
Date:  4 Nov 1873
Classmark:  DAR 103: 181
Letter no:  DCP-LETT-9132

To J. D. Hooker   6 November [1873]

Summary

Suggests experiment and observations to carry out on pitcher [of Nepenthes].

Author:  Charles Robert Darwin
Addressee:  Joseph Dalton Hooker
Date:  6 Nov [1873]
Classmark:  Royal Botanic Garden Kew (JDH/3/6 Insectivorous plants 1873–8 f.5)
Letter no:  DCP-LETT-9134

To J. D. Hooker   6 November 1873

Summary

Is coming to stay in London and wants to arrange a visit to Kew to talk with JDH, see the Eucalypti, and observe Mimosa albida.

Author:  Charles Robert Darwin
Addressee:  Joseph Dalton Hooker
Date:  6 Nov 1873
Classmark:  Royal Botanic Garden Kew (JDH/3/6 Insectivorous plants 1873–8 f.4)
Letter no:  DCP-LETT-9135

From J. D. Hooker   [4–9 September 1845]

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Summary

The most experienced botanists argue for the "validity of species in nature". Against taxonomic "splitters".

CD’s Cape Tres Montes plants.

Author:  Joseph Dalton Hooker
Addressee:  Charles Robert Darwin
Date:  [4–9 Sept 1845]
Classmark:  DAR 104: 208–9
Letter no:  DCP-LETT-914

To J. D. Hooker   [9 November 1873]

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Summary

Returned from visit.

Thinks several species of Eucalyptus would be worth experimenting on. Sends list.Mimosa albida would be worth its weight in diamonds. Neptunia worth more than diamonds.

Author:  Charles Robert Darwin
Addressee:  Joseph Dalton Hooker
Date:  [9 Nov 1873]
Classmark:  DAR 95: 304–5
Letter no:  DCP-LETT-9146

To J. D. Hooker   [10 September 1845]

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Summary

Going to Shrewsbury on Monday.

Means to attempt the question of species: "though I shall get more kicks than half-pennies, I will, life serving, attempt my work".

Author:  Charles Robert Darwin
Addressee:  Joseph Dalton Hooker
Date:  [10 Sept 1845]
Classmark:  DAR 114: 41
Letter no:  DCP-LETT-915

From J. D. Hooker   [8 November 1873]

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Summary

Has had a week’s cessation of Nepenthes work.

Had to get out a paper for the Linnean Society on Thursday.

Has tried Mimosa albida in hothouse and found it wonderfully sensitive.

A military report from India praises his travel book.

Author:  Joseph Dalton Hooker
Addressee:  Charles Robert Darwin
Date:  [8 Nov 1873]
Classmark:  DAR 103: 184–5
Letter no:  DCP-LETT-9150

To J. D. Hooker   24 November 1873

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Summary

Has been working hard on Mimosa albida. Could JDH ever make its opposite leaflets shut up close, as in sleep, when he irritated them? CD doubts they do, except in sleep. Thinks movement a protection against water.

Has examined only one specimen of Eucalyptus.

Cannot believe JDH’s results from cutting a hole in pitcher in his Nepenthes experiment.

Author:  Charles Robert Darwin
Addressee:  Joseph Dalton Hooker
Date:  24 Nov 1873
Classmark:  DAR 95: 306–7
Letter no:  DCP-LETT-9158
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