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Darwin, C. R. in correspondent 
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From:
Wilhelm Breitenbach
To:
Charles Robert Darwin
Date:
26 July 1876
Source of text:
DAR 111: B50–4; DAR 160: 290
Summary:

Observations on pollinia of Orchis maculata

and on Primula elatior. [On latter, see Forms of flowers, p. 34.]

Contributor:
Darwin Correspondence Project
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From:
Wilhelm Breitenbach
To:
Charles Robert Darwin
Date:
11 Sept 1876
Source of text:
DAR 160: 292
Summary:

His research on Orchis maculata.

Discusses effect of disuse of anthers in Salvia officinalis.

Pleased CD can use his observations on Primula elatior.

Contributor:
Darwin Correspondence Project
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From:
Wilhelm Breitenbach
To:
Charles Robert Darwin
Date:
19 Sept 1877
Source of text:
DAR 160: 291
Summary:

Describes data relating to variability of Primula elatior.

Contributor:
Darwin Correspondence Project
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From:
Wilhelm Breitenbach
To:
Charles Robert Darwin
Date:
17 Apr 1879
Source of text:
DAR 160: 293
Summary:

Observations on unusual mating behaviour of canaries.

Contributor:
Darwin Correspondence Project
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From:
Wilhelm Breitenbach
To:
Charles Robert Darwin
Date:
10 Feb 1880
Source of text:
DAR 160: 294
Summary:

Describes formation of student nature study club at the University of Jena. Sends birthday greetings from the club.

Contributor:
Darwin Correspondence Project
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From:
Wilhelm Breitenbach
To:
Charles Robert Darwin
Date:
[before 20 June 1881]
Source of text:
DAR 202: 16
Summary:

Arrived in Brazil three months ago. Studying insects and plants, but work suffers from lack of scientific literature.

Fritz Müller has written to him to observe relations between ants and plants.

Writing popular articles about evolution for German newspaper in Brazil.

Sends paper from Kosmos.

Expects to spend several years in Brazil.

Contributor:
Darwin Correspondence Project
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From:
Wilhelm Breitenbach
To:
Charles Robert Darwin
Date:
9 Sept 1881
Source of text:
DAR 160: 295
Summary:

Thanks for gift of Movement in plants.

Plans botanical research in Brazil.

Hermann von Jhering is conducting experiments on snakes.

WB obliged to work as newspaper correspondent.

Plans breeding experiments on dimorphic plants.

Contributor:
Darwin Correspondence Project
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From:
Wilhelm Breitenbach
To:
Charles Robert Darwin
Date:
22 Feb 1882
Source of text:
DAR 160: 296
Summary:

Describes his collections and research on Brazilian insects, especially Orthoptera. Comments on insect phylogeny.

Contributor:
Darwin Correspondence Project
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From:
Charles Robert Darwin
To:
Wilhelm Breitenbach
Date:
13 Feb 1880
Source of text:
DAR 143: 143
Summary:

Thanks society of students at Jena for birthday congratulations.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Wilhelm Breitenbach
Date:
21 Sept 1880
Source of text:
DAR 143: 144
Summary:

Comments on WB’s paper ["Über Variabilitäts-Erscheinungen an den Blüthen von Primula elatior und eine Anwendung des biogenetischen Grundgesetzes", Bot. Ztg. 38 (1880): 577–80].

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Wilhelm Breitenbach
Date:
20 [June] 1881
Source of text:
DAR 143: 145
Summary:

Glad WB has arrived in Brazil. Suggests study of insects and study of fertilisation in Melastomataceae. Want of books is not a serious evil.

Contributor:
Darwin Correspondence Project