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Darwin, C. R. in correspondent 
Preyer, William in correspondent 
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From:
Charles Robert Darwin
To:
William Thierry (William) Preyer
Date:
31 Mar 1868
Source of text:
LL 3: 88
Summary:

Glad to hear that WP defends species transmutation. German support is the chief reason to hope that their views will prevail.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
William Thierry (William) Preyer
Date:
[before 21 Mar 1869]
Source of text:
DAR 147: 262–5
Summary:

Replies to inquiries about his life and career.

Contributor:
Darwin Correspondence Project
From:
William Thierry (William) Preyer
To:
Charles Robert Darwin
Date:
21 Mar 1869
Source of text:
DAR 174: 67
Summary:

Has given a lecture series on Darwinism which was attended by 200–500 students.

Would like to compile a list of CD’s works.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
William Thierry (William) Preyer
Date:
29 Mar 1869
Source of text:
DAR 147: 254–6
Summary:

Congratulates WP on the success of his lectures.

Discusses the phrase "struggle for existence".

Sends a list of his papers.

Contributor:
Darwin Correspondence Project
From:
William Thierry (William) Preyer
To:
Charles Robert Darwin
Date:
[before 17 Feb 1870]
Source of text:
DAR 261.11: 21 (EH 88206073)
Summary:

Notes the differences in haemoglobin between species; this proves, to WP, that natural selection does not act only on morphological development.

Remarks on the differences and similarities in the effects of prussic acid on different groups of animals.

Questions CD on his early education and influences.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
William Thierry (William) Preyer
Date:
17 Feb [1870]
Source of text:
Ralph Colp Jr (private collection)
Summary:

Comments on effects of prussic acid on different individuals of the same species and other physiological research by WP.

Provides information about his studies in Edinburgh and Cambridge and qualifications he had for Beagle voyage. Describes influence of R. E. Grant and J. S. Henslow.

Contributor:
Darwin Correspondence Project
From:
William Thierry (William) Preyer
To:
Charles Robert Darwin
Date:
9 May 1870
Source of text:
DAR 174: 68
Summary:

Sends his "Charles Darwin, eine biographische Skizze" [Das Ausland 2 Apr 1870].

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
William Thierry (William) Preyer
Date:
15 May 1870
Source of text:
DAR 147: 256–8
Summary:

Comments on WP’s biographical article on CD. Asks him to thank O. F. Peschel for his present of the publication [Das Ausland 2 Apr 1870].

Contributor:
Darwin Correspondence Project
From:
William Thierry (William) Preyer
To:
Charles Robert Darwin
Date:
27 Apr 1871
Source of text:
DAR 87: 52, DAR 174: 69
Summary:

Thanks CD for Origin, 5th ed.

Comments on reviews of Descent by the Duke of Argyll and A. R. Wallace.

Lists the Darwinian professors at Jena.

WP’s work shows external ear to have no physiological functions.

W. Müller’s book not yet arrived. Will send Müller’s next works.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
William Thierry (William) Preyer
Date:
30 Apr 1871
Source of text:
DAR 147: 265–7
Summary:

Is sending copy of Descent.

Thanks for copy of WP’s book [Die Blutkrystalle (1871)].

Discusses shape of external ear.

Contributor:
Darwin Correspondence Project
From:
William Thierry (William) Preyer
To:
Charles Robert Darwin
Date:
8 May 1871
Source of text:
DAR 87: 49–51
Summary:

Delighted that CD does not hesitate to follow his theory to its last consequences. "This is far more difficult in England than in Germany."

Wilhelm Müller in his new book [Beiträge zur pathologischen Anatomie und Physiologie des menschlichen Rückenmarks (1871)], adduces many facts in favour of CD’s theory.

Various observations on the human ear. [See Descent, 2d ed., p. 14 n.]

Contributor:
Darwin Correspondence Project
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From:
Charles Robert Darwin
To:
William Thierry (William) Preyer
Date:
13 May 1871
Source of text:
DAR 147: 267–8
Summary:

Obliged for letter about human ear. Comments on ears and on E. R. Lankester’s idea about the ear-lobe.

Contributor:
Darwin Correspondence Project
From:
William Thierry (William) Preyer
To:
Charles Robert Darwin
Date:
6 July 1877
Source of text:
DAR 174: 70
Summary:

Asks for CD’s "Sketch of an infant" [Collected papers 2: 191–200]. He has made observations on new-born children and mammals to determine what behaviour is inherited and what acquired.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
William Thierry (William) Preyer
Date:
8 July 1877
Source of text:
DAR 147: 268–9
Summary:

Discusses inheritance.

Has WP heard of Douglas Spalding’s experiments of blindfolding chickens ["Instinct – with original observations on young animals", Rep. BAAS 42 (1872): 141–3]?

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
William Thierry (William) Preyer
Date:
25 Jan 1878
Source of text:
DAR 147: 269
Summary:

Thanks WP for election [as honorary member of the Medicinisch-Naturwissenschaftliche Gessellschaft zu Jena].

Contributor:
Darwin Correspondence Project
From:
William Thierry (William) Preyer
To:
Charles Robert Darwin
Date:
25 Nov 1880
Source of text:
DAR 174: 71
Summary:

Sends his book [Naturwissenschaftliche Thatsachen und Probleme. Populäre Vorträge (1880)].

Anxious to receive Movement in plants because CD’s methods may be applicable to his experiments on the earliest movements of animal embryos.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
William Thierry (William) Preyer
Date:
27 Nov 1880
Source of text:
DAR 147: 270
Summary:

Will send copy of Movement in plants.

Encloses copies of articles [unspecified].

Contributor:
Darwin Correspondence Project
From:
William Thierry (William) Preyer
To:
Charles Robert Darwin
Date:
2 Dec 1880
Source of text:
DAR 174: 72
Summary:

CD’s comment that certain instincts originate as variations of the brain, rather than as habits, is supported by Brown-Séquard’s and C. F. O. Westphal’s work on epileptiform movements.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
William Thierry (William) Preyer
Date:
28 Oct 1881
Source of text:
DAR 147: 271
Summary:

Thanks WP for copy of his Die Seele des Kindes [1882].

Contributor:
Darwin Correspondence Project