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1870-1879::1875::03 in date 
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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-9903

From:
Thomas Burgess
To:
Charles Robert Darwin
Date:
26 Mar 1875
Source of text:
DAR 106: D15–16
Summary:

TB, who sailed with CD [as a Royal Marine] in the Beagle, asks for CD’s portrait. Recalls some events they shared.

Contributor:
Darwin Correspondence Project
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DCP-LETT-9904

From:
Robert Lawson (Lawson) Tait
To:
Charles Robert Darwin
Date:
27 Mar [1875]
Source of text:
DAR 178: 5
Summary:

Is preparing a paper on the umbilical cord ["On the anatomy of the umbilical cord", Proc. R. Soc. Lond. 23 (1875): 498–501; 24 (1876): 417–40] of which he sends a preliminary note [missing]. Believes spiral growth of the umbilical cord is important evidence of the descent of man; speculates on spiral growth in general.

Contributor:
Darwin Correspondence Project
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