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From:
Charles Robert Darwin
To:
Archibald Geikie
Date:
20 Dec [1871]
Source of text:
The University of Edinburgh Centre for Research Collections (Gen.1425/71)
Summary:

Asks to borrow AG’s paper on denudation of flat or nearly flat surfaces ["On modern denudation", Trans. Geol. Soc. of Glasgow 3: 153-90]. CD has recently been making some observations he thinks throw a little light on the subject.

Contributor:
Darwin Correspondence Project
From:
Mary Lua Adelia (Mary) Davis; Mary Lua Adelia (Mary) Treat
To:
Charles Robert Darwin
Date:
20 Dec 1871
Source of text:
DAR 58.1: 33
Summary:

Describes fly-catching activity of Drosera longifolia.

Experiments on Papilio asterias; sex of adult determined by length of larval feeding time.

Contributor:
Darwin Correspondence Project
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Text Online
From:
Edward Livingston Youmans
To:
Alfred Russel Wallace
Date:
20 December 1871
Source of text:
British Library, The: BL Add. 46435 ff. 230-231
Summary:

No summary available.

Contributor:
Alfred Russel Wallace Correspondence Project