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From Charles Lyell   1 March 1866

Summary

Feels sure that at times the globe must have been superficially cooler. Believes CD will turn out right with regard to migration across the equator via mountain chains, while the tropical heat of certain lowlands was retained.

Author:  Charles Lyell, 1st baronet
Addressee:  Charles Robert Darwin
Date:  1 Mar 1866
Classmark:  DAR 91: 89–90
Letter no:  DCP-LETT-5024

Matches: 1 hit

  • … see Correspondence vol.  11, letter to J.  D.  Hooker, 5 March [1863] and n.  17). In the …

From Charles Lyell   10 March 1866

Summary

Comments on cool-period MS. Still believes geographical changes principal cause of former changes of climate.

Author:  Charles Lyell, 1st baronet
Addressee:  Charles Robert Darwin
Date:  10 Mar 1866
Classmark:  K. M. Lyell ed. 1881, 2: 408–9
Letter no:  DCP-LETT-5031

Matches: 1 hit

  • Hooker had described moraines and other evidence of former glaciation in valleys in Sikkim and elsewhere in the Himalayas in J.  D.  Hooker 1854 , 1: 248, 380. The mountains of Sikkim are near latitude 28 o N, and the Organ Mountains of Brazil are near latitude 23 o S ( Times atlas ). CD sent Lyell Hooker’s letter of 9 November 1856 ( Correspondence vol.  6) with the manuscript of chapter 11  …
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