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DCP-LETT-7824

From:
Charles Robert Darwin
To:
Frans Cornelis (Franciscus Cornelius) Donders
Date:
19 June 1871
Source of text:
American Philosophical Society (Mss.B.D25.)
Summary:

Thanks FCD for information about eyes [for Expression].

Must interrupt work on the subject to prepare new edition of Origin [6th].

Comments on gift of a new work by FCD [possibly "Die Projection der Gesichtserscheinung nach der Richtungslinien", Arch. Opthalmol. 17 (1871) Abt. 2: 1–68].

Contributor:
Darwin Correspondence Project

DCP-LETT-7826

From:
Thomas Henry Farrer, 1st baronet and 1st Baron Farrer
To:
Charles Robert Darwin
Date:
19 June 1871
Source of text:
DAR 164: 69–70
Summary:

Observations on orchids. Ophrys apifera; confirms CD’s observation on pollinia.  The nesting of ducks in trees is an example of change of instinct and habit.

Contributor:
Darwin Correspondence Project

DCP-LETT-7825

From:
Ernst Hugo Heinrich (Ernst) Pfitzer
To:
Charles Robert Darwin
Date:
19 June 1871
Source of text:
DAR 174: 41
Summary:

Sends publication [unspecified].

Notes adaptive mechanism in epiphytes.

Contributor:
Darwin Correspondence Project
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