To James Croll 10 January 1869
Summary
Apologises for having kept JC’s book so long; would like to keep it about ten days more.
| Author: | Charles Robert Darwin |
| Addressee: | James Croll |
| Date: | 10 Jan 1869 |
| Classmark: | J. C. Irons 1896, p. 215 |
| Letter no: | DCP-LETT-6547F |
To James Croll 31 January [1869]
Summary
Returns book with thanks. "Joyfully accepts" idea of the warming of Southern Hemisphere during glacial period in the Northern. Lyell is unwilling.
Mentions H. N. Moseley’s study of descent of glaciers [Proc. R. Soc. Lond. 17 (1869): 202–8].
CD greatly troubled by problem of age of the earth and calculations of Sir William Thomson. Asks about changes in the form of the globe.
| Author: | Charles Robert Darwin |
| Addressee: | James Croll |
| Date: | 31 Jan [1869] |
| Classmark: | American Philosophical Society (Mss.B.D25.361) |
| Letter no: | DCP-LETT-6585 |
To James Croll 6 February [1869]
Summary
Consoling to CD that JC gives "a little more age to the world".
Cites article by Henry Moseley ["On the mechanical possibility of the descent of glaciers", Proc. R. Soc. Lond. 17 (1869): 202–8].
Mentions article by A. R. Clarke on shape of the globe.
| Author: | Charles Robert Darwin |
| Addressee: | James Croll |
| Date: | 6 Feb [1869] |
| Classmark: | American Philosophical Society (Mss.B.D25.) |
| Letter no: | DCP-LETT-6603 |
To James Croll 24 February [1869]
Summary
Thanks JC for his proofs of article on the movement of glaciers.
| Author: | Charles Robert Darwin |
| Addressee: | James Croll |
| Date: | 24 Feb [1869] |
| Classmark: | American Philosophical Society (Mss.B.D25.271) |
| Letter no: | DCP-LETT-6630 |
