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To H. C. Watson   [after 10 June 1856]

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Summary

Do the plants that are common to Europe and North America nearly all live north of the Arctic Circle? CD bases his question on HCW’s "capital" comparison between relations of Europe to North America and Europe to E. Asia if the intervening land had been submerged. CD has been led to speculate that in the mid-Pliocene the organisms now living in middle Europe and northern U. S. lived within the Arctic Circle. Subsequent movements of this flora with advance and retreat of glaciers would explain present distribution better than Forbes’s vast submergences.

Author:  Charles Robert Darwin
Addressee:  Hewett Cottrell Watson
Date:  [after 10 June 1856]
Classmark:  DAR 185: 52
Letter no:  DCP-LETT-1899

From Hewett Cottrell Watson   5 June 1856

Summary

Answers CD’s questions about plants common to U. S. and Britain and their distribution in Europe.

Variability of agrarian weeds.

Author:  Hewett Cottrell Watson
Addressee:  Charles Robert Darwin
Date:  5 June 1856
Classmark:  DAR 181: 32
Letter no:  DCP-LETT-1891

From H. C. Watson   10 June 1856

Summary

Evidence relevant to E. Forbes’s land-bridge theory.

Author:  Hewett Cottrell Watson
Addressee:  Charles Robert Darwin
Date:  10 June 1856
Classmark:  DAR 181: 33
Letter no:  DCP-LETT-1898

From H. C. Watson   20 June 1856

Summary

Conveys [? J. T. I. Boswell-]Syme’s opinion of variability of agrarian weeds and ranges of species common to U. S. and W. Europe. The Hispano-Hibernian connection.

Author:  Hewett Cottrell Watson
Addressee:  Charles Robert Darwin
Date:  20 June 1856
Classmark:  DAR 181: 34
Letter no:  DCP-LETT-1907

From H. C. Watson   10 November 1856

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Summary

Greatly interested in CD’s experiments with seeds in salt water [see "Action of sea-water on seeds", Collected papers 1: 264–73]. Believes CD exaggerates the force of the objection, against migration, that seeds tend to sink.

Author:  Hewett Cottrell Watson
Addressee:  Charles Robert Darwin
Date:  10 Nov 1856
Classmark:  DAR 205.3: 296
Letter no:  DCP-LETT-1985

From H. C. Watson   19 November 1856

Summary

Discusses means of seed transport.

Considers the difficulty of deciding which, if any, botanical species are real.

Author:  Hewett Cottrell Watson
Addressee:  Charles Robert Darwin
Date:  19 Nov 1856
Classmark:  DAR 98: A7–A10
Letter no:  DCP-LETT-1994

From H. C. Watson   26 November 1856

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Summary

Responds to CD’s query on Subularia and Limosella. There are discrepancies among authorities on whether Subularia flowers out of water. Limosella certainly flowers out of water.

Author:  Hewett Cottrell Watson
Addressee:  Charles Robert Darwin
Date:  26 Nov 1856
Classmark:  DAR 207: 19
Letter no:  DCP-LETT-2002

From H. C. Watson   [28 December 1856]

Summary

Notes on the comparative rarity of intermediate forms between species, and the varying relationships those forms may have to one or both species between which they are intermediate.

Author:  Hewett Cottrell Watson
Addressee:  Charles Robert Darwin
Date:  [28 Dec 1856]
Classmark:  DAR 98: A15–18
Letter no:  DCP-LETT-2023
Document type
letter (8)
Addressee
Correspondent
Darwin, C. R.[X]
Watson, H. C.[X]
Date
1856
06 (4)
11 (3)
12 (1)
letter