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Müller, Fritz in addressee 
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From:
Charles Robert Darwin
To:
Johann Friedrich Theodor (Fritz) Müller
Date:
10 Aug [1865]
Source of text:
The British Library (Loan MS 10 no 1)
Summary:

Has read and admires FM’s work on species.

Observations on Crustacea are good and original; asks FM to dissect and check some of CD’s observations on cirripedes.

Has sent "Climbing plants" paper [J. Proc. Linn. Soc. Lond. 9 (1865): 1–118] and would like to send Orchids.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Johann Friedrich Theodor (Fritz) Müller
Date:
20 Sept [1865]
Source of text:
The British Library (Loan MS 10 no 2)
Summary:

Thanks for interesting letter on climbing plants.

FM’s view on Anelasma seems probable.

Difficulty quoted by FM from A. Agassiz on embryology of Echinodermata is quite beyond CD.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Johann Friedrich Theodor (Fritz) Müller
Date:
17 Oct [1865]
Source of text:
The British Library (Loan MS 10 no 3)
Summary:

Is sending FM’s two letters on climbing plants as a paper to the Linnean Society ["Notes on some of the climbing plants near Desterro, in south Brazil", J. Proc. Linn. Soc. Lond. (Bot.) 9 (1867): 344–9].

Adaptations for pollination in Catasetum.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Johann Friedrich Theodor (Fritz) Müller
Date:
9 Dec [1865]
Source of text:
The British Library (Loan MS 10 no 4)
Summary:

Has forwarded FM’s MS to Max Schultze, but did not read it.

Movement of stem apex in Linum.

Haeckel’s paper on reproduction in certain Medusae.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Johann Friedrich Theodor (Fritz) Müller
Date:
11 Jan 1866
Source of text:
The British Library (Loan MS 10 no 5)
Summary:

Has read FM’s paper on sponges ["Über Darwinella aurea", Arch. Miskrosk. Anat. 1 (1865): 344–53] with interest.

Has also read FM’s work on the metamorphoses of Peneus [Ann. & Mag. Nat. Hist. 3d ser. 14 (1864): 104–15], an interesting and important embryological discovery.

CD regards Louis Agassiz’s opinions as valueless.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Johann Friedrich Theodor (Fritz) Müller
Date:
9 and 15 Apr 1866
Source of text:
The British Library (Loan MS 10 no 6)
Summary:

Structure of Scaevola and its fertilisation with insect aid.

Fertilisation of Aristolochia.

FM’s paper on climbing plants [see 5146].

Is preparing new edition of Origin.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Johann Friedrich Theodor (Fritz) Müller
Date:
23 May 1866
Source of text:
The British Library (Loan MS 10 no 7)
Summary:

Thanks for information on orchids

and facts on coastal flora and fauna.

Asks FM to look out for dimorphic aquatic and marsh plants.

Has read pamphlets "in our favour" by Carl v. Nägeli and Oscar Schmidt.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Johann Friedrich Theodor (Fritz) Müller
Date:
23 Aug [1866]
Source of text:
The British Library (Loan MS 10 no 8)
Summary:

Thanks for observations on orchids.

FM’s paper on climbing plants [see 5146]; CD has received proofs.

Carl Claus’s pamphlet on copepods [Die Copepodenfauna von Nizza (1866)].

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Johann Friedrich Theodor (Fritz) Müller
Date:
25 Sept [1866]
Source of text:
The British Library (Loan MS 10 no 9)
Summary:

Fertilisation in orchids: Friedrich Hildebrand’s paper.

Self-sterility.

Climbing plants.

Agassiz’s attempts to eliminate all Darwinian views.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Johann Friedrich Theodor (Fritz) Müller
Date:
[before 10 Dec 1866]
Source of text:
The British Library (Loan MS 10 no 10)
Summary:

Hildebrand’s paper on trimorphism in Oxalis ["Über den Trimorphismus in der Gattung Oxalis", Monatsber. K. Preuss. Akad. Wiss. Berlin (1866): 352–74].

Problems of explaining brightly coloured, attractive seeds.

Haeckel has visited Down.

FM’s climbing plants paper is printed [J. Proc. Linn. Soc. Lond. (Bot.) 9 (1867): 344–9].

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Johann Friedrich Theodor (Fritz) Müller
Date:
31 Dec 1866 and 1 Jan 1867
Source of text:
The British Library (Loan MS 10 no 11)
Summary:

Thanks for observations on dimorphic plants. Dimorphism prevalent in certain groups throughout the world.

Retarded fertilisation in certain orchids.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Johann Friedrich Theodor (Fritz) Müller
Date:
7 Feb [1867]
Source of text:
The British Library (Loan MS 10 no 12)
Summary:

CD’s Variation is in printer’s hands.

Orchid self-sterility.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Johann Friedrich Theodor (Fritz) Müller
Date:
22 Feb [1867]
Source of text:
The British Library (Loan MS 10 no 13)
Summary:

Observations on orchid self-sterility.

Wants information on characters that may have originated through sexual selection in lower animals.

Encloses queries on expression.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Johann Friedrich Theodor (Fritz) Müller
Date:
25 Mar [1867]
Source of text:
The British Library (Loan MS 10 no 14)
Summary:

Thanks for facts on orchids.

Friedrich Hildebrand’s new book on fertilisation of plants [Die Geschlechten-Vertheilung bei den Pflanzen (1867)].

CD correcting proofs of Variation.

FM likes Ernst Haeckel’s book [Generelle Morphologie (1866)].

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Johann Friedrich Theodor (Fritz) Müller
Date:
22 Apr [1867]
Source of text:
The British Library (Loan MS 10 no 15)
Summary:

Self-sterility in orchids.

Growth differences in plants raised from self- and cross-fertilised seed.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Johann Friedrich Theodor (Fritz) Müller
Date:
26 May [1867]
Source of text:
The British Library (Loan MS 10 no 16)
Summary:

Thanks for information on sexual differences.

Orchids; self-sterility and difficulty of getting seeds to germinate.

Dimorphism.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Johann Friedrich Theodor (Fritz) Müller
Date:
31 July [1867]
Source of text:
The British Library (Loan MS 10 no 17)
Summary:

Has abstracted for insertion in his sterility chapter [Variation 2, ch. 18], FM’s observations of plant’s pollen being poisonous to itself.

Occurrence of mimetic plants.

Colouring of Planariae.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Johann Friedrich Theodor (Fritz) Müller
Date:
15 Aug [1867]
Source of text:
The British Library (Loan MS 10 no 18)
Summary:

Queries about expressions in crying monkeys.

Has received letter from Hermann Müller on orchid fertilisation.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Johann Friedrich Theodor (Fritz) Müller
Date:
2 Nov 1867
Source of text:
The British Library (Loan MS 10 no 19)
Summary:

Variation to be published at end of month.

Dimorphism and self-sterility.

Seed dissemination in Adenanthera.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Johann Friedrich Theodor (Fritz) Müller
Date:
30 Jan [1868]
Source of text:
The British Library (Loan MS 10 no 20)
Summary:

Sends Variation and would like to hear what FM thinks of Pangenesis.

Thanks for information on expression.

Dimorphic plants;

differences in seed production in cross- and self-fertilised plants.

Contributor:
Darwin Correspondence Project