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From Charles Lyell   5 May 1869

Summary

Recalls Cuvier’s reaction to Principles of geology.

Comments on Wallace’s article in the Quarterly Review [see 6684].

Not opposed to ARW’s idea that Supreme Will might direct variation.

Quotes passage in letter from ARW arguing for causes other than selection in determining human abilities.

Discusses excavation of lakes by glaciers.

J. P. Lesley does not believe ice-sheets involved in eroding Appalachians.

Author:  Charles Lyell, 1st baronet
Addressee:  Charles Robert Darwin
Date:  5 May 1869
Classmark:  Lyell 1881, 2: 441; DAR 85: A100–1
Letter no:  DCP-LETT-6728

From Charles Lyell   2 November 1869

Summary

Comments on Huxley’s address ["Geological reform", Q. J. Geol. Soc. Lond. 25 (1869): xxxviii–liii].

Physicists have ignored variation in sea-level in calculating effects.

Doubts if sun only source of heat.

Notes average depth of sea is 15 times height of land.

Criticises CD’s concept of permanent continents.

Sedimentary strata of Alleghenies must have derived from continent located where Atlantic is. Thinks enormous amount of denudation, submergence, and elevation may have accompanied relatively insignificant organic changes.

Author:  Charles Lyell, 1st baronet
Addressee:  Charles Robert Darwin
Date:  2 Nov 1869
Classmark:  The University of Edinburgh Centre for Research Collections (Gen.113.ff.3734–3737)
Letter no:  DCP-LETT-6967
Document type
letter (2)
Author
Addressee
Darwin, C. R.disabled_by_default
Correspondent
Darwin, C. R.disabled_by_default
Lyell, Charlesdisabled_by_default