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To J. V. Carus 4 May 1869
Summary
Discusses changes in 5th edition of Origin owing to new evidence. CD now places more value on action of external conditions; thinks lapse of time [required for development of species] not so great as some geologists have thought, and single variations [saltations] of even less importance compared with individual differences.
| Author: | Charles Robert Darwin |
| Addressee: | Julius Victor Carus |
| Date: | 4 May 1869 |
| Classmark: | Staatsbibliothek zu Berlin – Preußischer Kulturbesitz (Slg. Darmstaedter Lc 1859: Darwin, Charles, Bl. 41–42) |
| Letter no: | DCP-LETT-6726 |
