To Asa Gray 16 April [1866]
Summary
AG’s second article on Climbing plants [Am. J. Sci. 2d ser. 41 (1866): 125–30].
Fritz Müller’s observations on Rubiaceae.
New edition [4th] of Origin.
| Author: | Charles Robert Darwin |
| Addressee: | Asa Gray |
| Date: | 16 Apr [1866] |
| Classmark: | Gray Herbarium of Harvard University (96) |
| Letter no: | DCP-LETT-5057 |
To Asa Gray 4 August [1866]
Summary
Thanks for AG’s trouble about new edition of Origin.
Will be printing his new book [Variation] at the end of the year.
[Forwarded by AG, with covering note, to Mr Fields of Ticknor & Fields.]
| Author: | Charles Robert Darwin |
| Addressee: | Asa Gray |
| Date: | 4 Aug [1866] |
| Classmark: | Gray Herbarium of Harvard University (85) |
| Letter no: | DCP-LETT-5177 |
To Asa Gray 10 September [1866]
Summary
L. Agassiz’s evidence [for glaciation of America] is very weak.
Thanks AG for arranging for American edition of Variation, but doubts that the book will be successful.
Has found no differences in pollen of Rhamnus so cannot conjecture whether it is dimorphic.
The common oxlip of England is certainly a hybrid between the primrose and the cowslip whereas Primula elatior is a good species.
Reports experiments on the relative vigour of seedlings from cross- and self-fertilised plants.
| Author: | Charles Robert Darwin |
| Addressee: | Asa Gray |
| Date: | 10 Sept [1866] |
| Classmark: | Gray Herbarium of Harvard University (92) |
| Letter no: | DCP-LETT-5210 |
