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To J. D. Hooker   8 April [1857]

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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

From J. D. Hooker   [11 April 1857]

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Summary

JDH cites W. H. Harvey’s observations on Fucus and David Don’s on Juncus as examples of variations that are independent of climate. There are many such cases. Gives his working scheme for categorising variation.

Author:  Joseph Dalton Hooker
Addressee:  Charles Robert Darwin
Date:  [11 Apr 1857]
Classmark:  DAR 104: 198–201
Letter no:  DCP-LETT-2074

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

From J. D. Hooker   [27] June 1857

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Summary

Embryology of plants of low systematic order. Comparative development begins only with first post-cotyledonary leaves.

Curt letter to JDH from George Henslow.

Author:  Joseph Dalton Hooker
Addressee:  Charles Robert Darwin
Date:  [27] June 1857
Classmark:  DAR 100: 115
Letter no:  DCP-LETT-2114

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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Summary

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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Summary

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
Document type
letter (36)
Addressee
Correspondent
Darwin, C. R. (36)
Hooker, J. D.[X]
Date
1857
01 (3)
03 (2)
04 (4)
05 (3)
06 (6)
07 (3)
08 (2)
09 (3)
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11 (2)
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