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Heer, Oswald in correspondent 
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DCP-LETT-9876

From:
Oswald Heer
To:
Charles Robert Darwin
Date:
1 Mar 1875
Source of text:
DAR 166: 130
Summary:

Comments on his Flora fossilis Arctica [vol. 3 (1875)]. Discusses successive appearance of plant families in geological periods. Relates plant development to rise of herbivorous mammals.

Comments on death of Charles Lyell.

Contributor:
Darwin Correspondence Project

DCP-LETT-9881

From:
Charles Robert Darwin
To:
Oswald Heer
Date:
8 Mar [1875]
Source of text:
Zentralbibliothek Zürich (Nachlass Oswald Heer 213.2)
Summary:

Thanks OH for his book [see 9876]; agrees that the sudden appearance of many dicotyledons in the Upper Chalk is a perplexing phenomenon for the evolutionist.

Contributor:
Darwin Correspondence Project

DCP-LETT-9901

From:
Oswald Heer
To:
Charles Robert Darwin
Date:
23 Mar 1875
Source of text:
DAR 166: 131
Summary:

Discusses his work [Flora fossilis Arctica, vol. 4, pt 1 (1876)].

Sends copy of [Fossile Pflanzen von Sumatra (1874)]. Comments on climate in Tertiary period, especially on Sumatra.

Comments on theory of Thomas Belt concerning climatic change in ice age.

Contributor:
Darwin Correspondence Project

DCP-LETT-10175

From:
Oswald Heer
To:
Charles Robert Darwin
Date:
28 Sept 1875
Source of text:
DAR 166: 132
Summary:

Comments on Insectivorous plants.

Describes his own work on fossil flora of Eastern Siberia.

Discusses genus Ginkgo.

Contributor:
Darwin Correspondence Project
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