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Darwin, C. R. in correspondent 
1840-1849::1845 in date 
Ehrenberg, C. G. in correspondent 
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DCP-LETT-837

From:
Christian Gottfried Ehrenberg
To:
Charles Robert Darwin
Date:
13 Mar 1845
Source of text:
DAR 39: 59a–c
Summary:

Regrets J. D. Hooker did not visit Berlin.

Describes legal difficulties of Ernst Dieffenbach.

Lists species of Infusoria found in dust samples. Discusses origin of Atlantic dust. Discusses Infusoria in cosmetic paint from Tierra del Fuego and Patagonian earth. Thanks CD for samples. Would like samples from sea-bed.

Contributor:
Darwin Correspondence Project

DCP-LETT-853

From:
Christian Gottfried Ehrenberg
To:
Charles Robert Darwin
Date:
8 Apr 1845
Source of text:
DAR 39: 60–1b
Summary:

Discusses table of Atlantic dust samples. Thinks dust came from South America.

Discusses Patagonian tuff samples.

Answers CD’s query about material from Pampas. Believes deposit made in brackish water.

Criticises account of Atlantic dust in F. J. F. Meyen [Reise um die Erde (1834–5)].

Contributor:
Darwin Correspondence Project
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