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To J. D. Hooker   8 October [1864]

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Summary

Huxley has answered Kölliker in Natural History Review [(1864): 566–80].

CD is correcting two of Scott’s papers; is convinced primrose and cowslip are two good species.

Author:  Charles Robert Darwin
Addressee:  Joseph Dalton Hooker
Date:  8 Oct [1864]
Classmark:  DAR 115: 251
Letter no:  DCP-LETT-4630

To J. D. Hooker   22 October [1864]

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Summary

To Lyell’s chagrin, CD has come round again to A. C. Ramsay’s glacial theory.

On primrose and cowslip, CD maintains they are good species, notwithstanding Scott’s work.

CD defines species by power of remaining constant for a good long time and showing appreciable amount of difference from close species.

Author:  Charles Robert Darwin
Addressee:  Joseph Dalton Hooker
Date:  22 Oct [1864]
Classmark:  DAR 115: 252
Letter no:  DCP-LETT-4642

From J. D. Hooker   [16? October 1864]

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Summary

Morphological differences only partly define species; physiological differences, e.g., incompatibility results in Primula, are far more interesting.

T. Thomson’s review of Agardh’s muddled book ["Agardh’s classification of plants", Nat. Hist. Rev. (1864): 536–51].

Author:  Joseph Dalton Hooker
Addressee:  Charles Robert Darwin
Date:  [16? Oct 1864]
Classmark:  DAR 101: 246, 246a
Letter no:  DCP-LETT-4638

From J. D. Hooker   26[–8] October 1864

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Summary

Comments at length on Ramsay’s glacial paper ["On the erosion of valleys and lakes", Philos. Mag. 4th ser. 28 (1864): 293–311]. Prefers it to Tyndall, but unconvinced about sea action and unwilling to grant that ice power sculptures the totality of landscape.

Unwilling to support Wallace for Royal Medal.

Herbert Spencer’s noisy vacuity.

Garden varieties that are constant and infertile with parent deserve to be called species.

Scott ineligible to be Linnean Society associate because he is not in England.

George Busk’s incoherent talk on Gibraltar cave fossils.

Author:  Joseph Dalton Hooker
Addressee:  Charles Robert Darwin
Date:  26[–8] Oct 1864
Classmark:  DAR 101: 247–53
Letter no:  DCP-LETT-4645
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letter (4)
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Darwin, C. R.disabled_by_default
Hooker, J. D.disabled_by_default