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DCP-LETT-11613

From:
Francis Darwin
To:
Charles Robert Darwin
Date:
[before 17 July 1878]
Source of text:
DAR 209.1: 155; DAR 274.1: 50, 52
Summary:

More sleepers from green-house.

Julius Sachs’s view of climbing plants: he distinguishes between nutation to find a support and growth after support is found.

Contributor:
Darwin Correspondence Project
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DCP-LETT-11614

From:
Reuben Almond Blair
To:
Charles Robert Darwin
Date:
17 July 1878
Source of text:
American Philosophical Society (Mss.B.D25.542)
Summary:

Explains difficulties in supplying wings of geese. Describes injury of old gander that sired the abnormal geese.

Contributor:
Darwin Correspondence Project

DCP-LETT-11615

From:
Charles Robert Darwin
To:
Francis Darwin
Date:
17 July [1878]
Source of text:
DAR 211: 37
Summary:

Discusses sleep movements of Porlieria.

Has read an abstract of Julius Wiesner on heliotropism and geotropism ["Die heliotropischen Erscheinungen im Pflanzenreiche", Anz. Kais. Akad. Wiss. Wien 15 (1878): 137–40] which seems important but is puzzling.

Gives details of his observations on climbing plants with reference to comments by Julius Sachs.

Contributor:
Darwin Correspondence Project
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