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To J. D. Hooker   [after 20 January 1857]

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CD finds Alphonse de Candolle very useful, though JDH has low opinion.

CD argues for accidental introductions explaining some odd distributions, e.g., New Zealand vs Australian plants.

CD’s method.

Diverging affinities in isolated genera.

Author:  Charles Robert Darwin
Addressee:  Joseph Dalton Hooker
Date:  [after 20 Jan 1857]
Classmark:  DAR 114: 190
Letter no:  DCP-LETT-2033

To J. D. Hooker   17 January [1857]

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Summary

CD will advise W. F. Daniell on collecting.

Author:  Charles Robert Darwin
Addressee:  Joseph Dalton Hooker
Date:  17 Jan [1857]
Classmark:  DAR 114: 188
Letter no:  DCP-LETT-2040

To J. D. Hooker   20 January [1857]

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Summary

CD will advise Daniell not to apply for Royal Society grant.

CD’s experiment: fish fed seeds, which germinated when voided.

Author:  Charles Robert Darwin
Addressee:  Joseph Dalton Hooker
Date:  20 Jan [1857]
Classmark:  DAR 114: 189
Letter no:  DCP-LETT-2042

To J. D. Hooker   15 March [1857]

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Summary

Separation of sexes in trees [U. S.].

Do plants offer positive evidence for "continuous land" theory?

Protean genera.

Author:  Charles Robert Darwin
Addressee:  Joseph Dalton Hooker
Date:  15 Mar [1857]
Classmark:  DAR 114: 193
Letter no:  DCP-LETT-2066

To J. D. Hooker   [21 March 1857]

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Summary

Ranges of species in large vs small genera: Asa Gray’s compilation fits CD’s expectation.

CD studies seedling mortality in his weed garden.

JDH’s work on Indian flora.

Author:  Charles Robert Darwin
Addressee:  Joseph Dalton Hooker
Date:  [21 Mar 1857]
Classmark:  DAR 114: 192a
Letter no:  DCP-LETT-2067

To J. D. Hooker   8 April [1857]

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Summary

Independence of variation from climate shown by several plant genera; CD asks for confirmation.

Progressing with book [Natural selection].

Author:  Charles Robert Darwin
Addressee:  Joseph Dalton Hooker
Date:  8 Apr [1857]
Classmark:  DAR 114: 191
Letter no:  DCP-LETT-2073

To J. D. Hooker   12 April [1857]

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Summary

Thanks JDH for response on variation. Studying variations that seem correlated with environment, e.g., north vs south, ascending mountains.

CD’s weed garden: observations on slugs killing seedlings.

Seed-salting. One-seventh of the plants of any country could be transported 924 miles by sea and would germinate.

Author:  Charles Robert Darwin
Addressee:  Joseph Dalton Hooker
Date:  12 Apr [1857]
Classmark:  DAR 114: 192
Letter no:  DCP-LETT-2075

To J. D. Hooker   [29 April 1857]

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Summary

Curative power of hydropathy.

General hairiness of alpine plants questioned: direct environmental effect.

CD has long felt JDH is too hard on bad observers.

Author:  Charles Robert Darwin
Addressee:  Joseph Dalton Hooker
Date:  [29 Apr 1857]
Classmark:  DAR 114: 194
Letter no:  DCP-LETT-2084

To J. D. Hooker   [2 May 1857]

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Summary

JDH has shaved the hair off the alpine plant.

CD apologises for his criticism.

Apparent but false relations of plant structure to climate: heath-like foliage of all Cape of Good Hope plants.

Author:  Charles Robert Darwin
Addressee:  Joseph Dalton Hooker
Date:  [2 May 1857]
Classmark:  DAR 114: 195
Letter no:  DCP-LETT-2087

To J. D. Hooker   [3 May 1857]

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Summary

JDH’s last letter demolishes woolly alpine plant theory.

Correlation of apetalous flowers and cold climate.

Author:  Charles Robert Darwin
Addressee:  Joseph Dalton Hooker
Date:  [3 May 1857]
Classmark:  DAR 114: 196
Letter no:  DCP-LETT-2088

To J. D. Hooker   16 [May 1857]

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Summary

Asks JDH’s opinion, and botanical evidence, on important law: parts that are highly developed in comparison to other allied species are very variable.

Interest in hairiness of alpine plants revived by reading A. Moquin-Tandon [Éléments de tératologie végétale (1841)]; correlation with dryness. CD seeks interpretation independent of direct environmental effect.

Author:  Charles Robert Darwin
Addressee:  Joseph Dalton Hooker
Date:  16 [May 1857]
Classmark:  DAR 114: 197
Letter no:  DCP-LETT-2092

To J. D. Hooker   2 June [1857]

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Summary

Qualifications of John Lindley, Huxley, Albany Hancock, Joseph Prestwich, J. C. Ross, and Francis Beaufort for Royal Medal.

Author:  Charles Robert Darwin
Addressee:  Joseph Dalton Hooker
Date:  2 June [1857]
Classmark:  DAR 114: 199
Letter no:  DCP-LETT-2099

To J. D. Hooker   3 June [1857]

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Summary

"Law" [see 2092] correlating variability and abnormal development not confirmed by JDH for plants.

CD studies struggle for existence in his weed garden.

Scotch fir observed at Moor Park.

Author:  Charles Robert Darwin
Addressee:  Joseph Dalton Hooker
Date:  3 June [1857]
Classmark:  DAR 114: 200
Letter no:  DCP-LETT-2101

To J. D. Hooker   5 June [1857]

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Summary

Royal Society medals.

Correlation of variability and abnormal development is G. R. Waterhouse’s law. Relation of this law to polymorphism.

Colouring and marks of ancestral horse deduced from facts observed in pigeons.

Author:  Charles Robert Darwin
Addressee:  Joseph Dalton Hooker
Date:  5 June [1857]
Classmark:  DAR 114: 201
Letter no:  DCP-LETT-2102

To J. D. Hooker   25 June [1857]

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Summary

Seedling leaves of gorse look like clover leaves. This is like young lions being striped. Thus, laws of animal embryology apply to plants.

Author:  Charles Robert Darwin
Addressee:  Joseph Dalton Hooker
Date:  25 June [1857]
Classmark:  DAR 114: 205
Letter no:  DCP-LETT-2112

To J. D. Hooker   1 July [1857]

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Summary

George Henslow’s curtness to JDH: "an attack of religion".

Embryonic leaves. Adaptive functions and taxonomic significance of cotyledons.

Asa Gray. Separation of sexes in U. S. trees.

Author:  Charles Robert Darwin
Addressee:  Joseph Dalton Hooker
Date:  1 July [1857]
Classmark:  DAR 114: 198
Letter no:  DCP-LETT-2116

To J. D. Hooker   5 July [1857]

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Does JDH’s Wahlenbergia confirm CD’s law? Variations of one species assume the character of a distinct but allied species or genus.

Seed-salting: old ones float and germinate.

Owen’s "grand paper" [? J. Proc. Linn. Soc. Lond. (Zool.) 2 (1858): 1–37].

Author:  Charles Robert Darwin
Addressee:  Joseph Dalton Hooker
Date:  5 July [1857]
Classmark:  DAR 114: 203
Letter no:  DCP-LETT-2117

To J. D. Hooker   14 July [1857]

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Asks to borrow several Floras. Must redo calculations as John Lubbock has shown him an important error.

Author:  Charles Robert Darwin
Addressee:  Joseph Dalton Hooker
Date:  14 July [1857]
Classmark:  DAR 114: 204
Letter no:  DCP-LETT-2124

To J. D. Hooker   1 August [1857]

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Important issue at stake with new flora calculations: evidence that species are only strongly marked varieties. Planning large-scale survey.

Author:  Charles Robert Darwin
Addressee:  Joseph Dalton Hooker
Date:  1 Aug [1857]
Classmark:  DAR 114: 206, 207
Letter no:  DCP-LETT-2130

To J. D. Hooker   22 August [1857]

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Tabulation of varieties goes on; very important as it shows the branching of forms. Mentions his principle of divergence.

Author:  Charles Robert Darwin
Addressee:  Joseph Dalton Hooker
Date:  22 Aug [1857]
Classmark:  DAR 114: 208
Letter no:  DCP-LETT-2134
Document type
letter (31)
Author
Darwin, C. R.[X]
Addressee
Correspondent
Darwin, C. R. (31)
Hooker, J. D.[X]
Date
1857
01 (3)
03 (2)
04 (3)
05 (3)
06 (5)
07 (3)
08 (2)
09 (3)
10 (2)
11 (2)
12 (3)
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