Thanks for Agassiz's Lectures. Lyell does not believe a word about glacial action of any kind in lowlands of Brazil. Agassiz's view of glacial movement has been given up by physicists.
Down. | Bromley. | Kent. S.E.
My dear Sir
I am a good deal overworked with the tedious labour of correcting the proofs of my new
book, but I cannot resist sending you a few lines to thank you for pleasant &
kind letter of Feb 25
I believe that the theory that glaciers are propelled by alternate freezing & thawing has been given up by all physicists.—
I did not know about the workers' wasps breeding.—
My new Book will interest you or any one else very little: it will not appear till November & will be entitled ``The Variation of Animals & Plants under Domestication''.—
With many thanks for your letter—
Believe me, yours very sincerely | Ch. Darwin
- f1 5455.f1The year is established by the reference to Variation (see nn. 2 and 8, below).
- f2 5455.f2See letter from B. D. Walsh, [25 February 1867]. CD had received the first proof-sheets of Variation on 1 March 1867 (CD's `Journal' (Correspondence vol. 15, Appendix II)).
- f3 5455.f3Walsh had defended his decision to become editor of Practical Entomologist on the grounds that it would promote the pursuit of science in America (see letter from B. D. Walsh, [25 February 1867]).
- f4 5455.f4CD refers to Louis Agassiz and the lecture on glaciers in J. L. R. Agassiz 1867. See letter from B. D. Walsh, [25 February 1867] and n. 4.
- f5 5455.f5Agassiz advanced the hypothesis that the Amazon valley had been covered by a huge glacier in J. L. R. Agassiz 1866. CD had discussed Agassiz's claims regarding glacial action in Brazil with Charles Lyell and other correspondents (see Correspondence vol. 14).
- f6 5455.f6For a summary of contemporary views on the causes of glacier movement, see C. Lyell 1867--8, 1: 369--74. For CD's earlier discussion of the topic, see Correspondence vol. 6, letter to T. H. Huxley, 17 January .
- f7 5455.f7See letter from B. D. Walsh, [25 February 1867] and n. 2.
- f8 5455.f8Variation was published in January 1868 (Freeman 1977).