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Zincke, F. B. in correspondent 
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From:
Foster Barham Zincke
To:
Charles Robert Darwin
Date:
23 [May 1876]
Source of text:
DAR 184: 10
Summary:

On communication noises used by domestic poultry.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Foster Barham Zincke
Date:
26 May [1876]
Source of text:
Det Kongelige Bibliotek, Copenhagen (Natural Sciences collections at the Faculty Library of Natural and Health Sciences)
Summary:

Thanks for a letter describing variation in chickens.

Contributor:
Darwin Correspondence Project
From:
Foster Barham Zincke
To:
Charles Robert Darwin
Date:
29 Nov 1876
Source of text:
DAR 184: 11
Summary:

Considers different animal instincts, some of which have reversed, others of which have proved persistent.

Contributor:
Darwin Correspondence Project