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From:
Charles Robert Darwin
To:
Oswald Heer
Date:
20 Apr [1861?]
Source of text:
Catherine Barnes (dealer) (2002)
Summary:

Thanks for correspondent’s Untersuchungen [? Über das Klima und die Vegetationsverhältnisse des Tertiärlandes (1860)]. CD has always considered subject interesting and important.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Frederick Wollaston Hutton
Date:
20 Apr 1861
Source of text:
DAR 145: 147
Summary:

Comments on FWH’s article ["Some remarks on Mr Darwin’s theory", Geologist (1861): 132–6, 183–8]. Does not adduce direct evidence of species change but believes it because so many phenomena thus explained.

Contributor:
Darwin Correspondence Project