From:
Charles Robert Darwin
To:
Joseph Dalton Hooker
Date:
22 Oct [1864]
Source of text:
DAR 115: 252
Summary:
To Lyell’s chagrin, CD has come round again to A. C. Ramsay’s glacial theory.
On primrose and cowslip, CD maintains they are good species, notwithstanding Scott’s work.
CD defines species by power of remaining constant for a good long time and showing appreciable amount of difference from close species.
Contributor:
Darwin Correspondence Project
