From:
Charles Robert Darwin
To:
William Benjamin Carpenter
Date:
6 Dec [1844]
Source of text:
DAR 185: 114
Summary:
Asks WBC if he will examine a specimen of calcareous rock.
Contributor:
Darwin Correspondence Project
From:
William Benjamin Carpenter
To:
Charles Robert Darwin
Date:
21 Dec 1844
Source of text:
DAR 39: 33–5
Summary:
Discusses microscopic examination of rock specimens taken from Pampas deposit and from Chilean tuff. Says he finds organic remains only in the tuff.
Contributor:
Darwin Correspondence Project