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From C. G. Ehrenberg   13 March 1845

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.

Author:  Christian Gottfried Ehrenberg
Addressee:  Charles Robert Darwin
Date:  13 Mar 1845
Classmark:  DAR 39: 59a–c
Letter no:  DCP-LETT-837

From C. G. Ehrenberg    8 April 1845

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)].

Author:  Christian Gottfried Ehrenberg
Addressee:  Charles Robert Darwin
Date:  8 Apr 1845
Classmark:  DAR 39: 60–1b
Letter no:  DCP-LETT-853
Document type
letter (2)
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Darwin, C. R.disabled_by_default
Correspondent
Darwin, C. R.disabled_by_default
Ehrenberg, C. G.disabled_by_default