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From Thomas Meehan   3 March 1873


Although he believes in evolution, TM feels that natural selection is an inadequate cause;

nor is he satisfied with E. D. Cope’s law of acceleration and retardation.

Discusses some of his work relating to nutrition and sex and colour and sex.

Author:  Thomas Meehan
Addressee:  Charles Robert Darwin
Date:  3 Mar 1873
Classmark:  DAR 171: 109
Letter no:  DCP-LETT-8796

To Thomas Meehan   19 March [1873]


Does not understand TM’s views on sex and vitality.

Agrees no real "essences" in genera, only broken groups of species.

Author:  Charles Robert Darwin
Addressee:  Thomas Meehan
Date:  19 Mar [1873]
Classmark:  DAR 146: 352
Letter no:  DCP-LETT-8816
Document type
letter (2)