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From George Howard Darwin   [before 11 May 1863]

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Summary

Notes, calculations, and diagrams on phyllotaxy.

Author:  George Howard Darwin
Addressee:  Charles Robert Darwin
Date:  [before 11 May 1863]
Classmark:  DAR 51: 6–7
Letter no:  DCP-LETT-3887

To Asa Gray   11 May [1863]

Summary

CD despairs when men like AG and Lyell consider themselves incapable of judging on change of species by descent.

Is confused over phyllotaxy.

Has been looking at Plantago lanceolata.

Author:  Charles Robert Darwin
Addressee:  Asa Gray
Date:  11 May [1863]
Classmark:  Gray Herbarium of Harvard University (59)
Letter no:  DCP-LETT-4153

To Osbert Salvin   11 [May 1863]

Summary

At the suggestion of J. D. Hooker CD offers his opinion on the value of a proposed collection to be made at the Galápagos. The display would not be attractive or appealing to amateurs in natural history, but the scientific value of good collections of every species would be very great if those of each island are rigorously kept separate.

Author:  Charles Robert Darwin
Addressee:  Osbert Salvin
Date:  11 [May 1863]
Classmark:  Sybil Rampen (private collection)
Letter no:  DCP-LETT-4153A