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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

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
Document type
letter (4)
Addressee
Correspondent
Darwin, C. R. (4)
Hooker, J. D.[X]
Date
1857
04
08 (1)
11 (1)
12 (1)
29 (1)
letter