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To J. D. Hooker 25 December [1868]
Summary
Is working on new edition of Origin [5th (1869)].
Asks JDH’s assistance on a problem posed by Nägeli on morphological differences that are of no utility to plants and hence could not be selected. CD wants to show that these differences do not support the idea of progressive development as Nägeli suggests.
Owen pitches into CD and Lyell in third volume of Anatomy of vertebrates [1866–8].
| Author: | Charles Robert Darwin |
| Addressee: | Joseph Dalton Hooker |
| Date: | 25 Dec [1868] |
| Classmark: | DAR 94: 105–7 |
| Letter no: | DCP-LETT-6512 |
Correspondent
| Darwin, C. R. | (1) |
| Hooker, J. D. |
