To A. R. Wallace 19 August [1868]
Summary
The problem of dimorphic plants and their fertility.
| Author: | Charles Robert Darwin |
| Addressee: | Alfred Russel Wallace |
| Date: | 19 Aug [1868] |
| Classmark: | The British Library (Add MS 46434: 143–6) |
| Letter no: | DCP-LETT-6322 |
To Louis Agassiz 19 August 1868
Summary
Thanks LA for information on sexual differences in the coloration of Amazonian fish. CD was anxious to know how the sexes differed because they are unusual in that the male has the largest share in looking after ova and young.
| Author: | Charles Robert Darwin |
| Addressee: | Jean Louis Rodolphe (Louis) Agassiz |
| Date: | 19 Aug 1868 |
| Classmark: | Houghton Library, Harvard University (MS Am 1419: 278) |
| Letter no: | DCP-LETT-6323 |
To J. D. Hooker 19 August 1868
Summary
Asks JDH to obtain from Sven Nilsson information on whether, in reindeer species in which both sexes are horned, the horns are first developed earlier or later than in species in which males alone have horns.
| Author: | Charles Robert Darwin |
| Addressee: | Joseph Dalton Hooker |
| Date: | 19 Aug 1868 |
| Classmark: | Lund University Library Special Collections (Sven Nilsson papers) |
| Letter no: | DCP-LETT-6324 |
From W. S. Dallas 19 August 1868
Summary
The material [from F. Müller] makes the translation more like a new edition.
German entomologists are becoming Darwinists.
| Author: | William Sweetland Dallas |
| Addressee: | Charles Robert Darwin |
| Date: | 19 Aug 1868 |
| Classmark: | DAR 162: 22 |
| Letter no: | DCP-LETT-6325 |
Document type
| letter | (4) |
Author
| Darwin, C. R. | (3) |
| Dallas, W. S. | (1) |
Addressee
| Agassiz, Louis | (1) |
| Darwin, C. R. | (1) |
| Hooker, J. D. | (1) |
| Wallace, A. R. | (1) |
Correspondent
| Darwin, C. R. | (4) |
| Agassiz, Louis | (1) |
| Dallas, W. S. | (1) |
| Hooker, J. D. | (1) |
| Wallace, A. R. | (1) |
