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To ?   18 July [1873?]


Comments on ability of recipient to move his scalp.

Author:  Charles Robert Darwin
Addressee:  Unidentified
Date:  18 July [1873?]
Classmark:  American Philosophical Society (Mss.B.D25.430)
Letter no:  DCP-LETT-8982

To Nature   [before 24 July 1873]


Sends a letter from J. D. Hague confirming his earlier observation [see 8788] of frightened behaviour of ants when they come upon dead ants. CD had asked for confirmation because J. T. Moggridge had suggested that the ants’ behaviour was alarm at the scent of the observer’s fingers.

Author:  Charles Robert Darwin
Addressee:  Nature
Date:  [before 24 July 1873]
Classmark:  Nature, 24 July 1873, p. 244
Letter no:  DCP-LETT-8985

To Edward Frankland   18 July [1873]


Agrees to delay sending the fluid [from the glands of Drosera] until early October. Will try suggestion about pepsin. [See 8981.]

Author:  Charles Robert Darwin
Addressee:  Edward Frankland
Date:  18 July [1873]
Classmark:  The John Rylands Library, The University of Manchester
Letter no:  DCP-LETT-8982A

From John Chapman   19 July 1873


Asks CD to meet with Dr Wild to discuss the Westminster Review, which CD has supported.

Quotes from Alexander Kennedy on Maori observations on competition between native New Zealand birds and introduced bees for nectar of tree blossoms.

Author:  John Chapman
Addressee:  Charles Robert Darwin
Date:  19 July 1873
Classmark:  DAR 161: 132, 132/1
Letter no:  DCP-LETT-8983

From J. T. Moggridge   22 July 1873


He will repeat the experiments in which CD found that formic acid vapour killed seeds [see 8866]. John Lindley describes effects of other acids on germination.

He has tabulated the large amount of variation in English Ophrys apifera.

Author:  John Traherne Moggridge
Addressee:  Charles Robert Darwin
Date:  22 July 1873
Classmark:  DAR 171: 219
Letter no:  DCP-LETT-8984

From J. T. Moggridge   24 July 1873


CD has clarified the way to conduct the formic acid experiment.

Author:  John Traherne Moggridge
Addressee:  Charles Robert Darwin
Date:  24 July 1873
Classmark:  DAR 171: 220
Letter no:  DCP-LETT-8986

To Armand Sabatier   24 July 1873


Thanks for Études sur la coeur et la circulation centrale dans la série des vertébrés (Studies on the heart and the central circulation in the vertebrate series; Sabatier 1873).

Author:  Charles Robert Darwin
Addressee:  Armand Sabatier
Date:  24 July 1873
Classmark:  Colby College Libraries
Letter no:  DCP-LETT-8986F

To J. S. Burdon Sanderson   25 July 1873


Describes his recent work on Drosera digestion of organic materials, e.g., albumen and gelatin. Edward Frankland has given CD a rough test for pepsin. Some plant extracts cause as much inflection as meat. Has found some reversible inflection with heat and perhaps some heat rigor. Has measured the extreme sensitivity of Drosera with very dilute solution of ammonium phosphate.

Author:  Charles Robert Darwin
Addressee:  John Scott Burdon Sanderson, baronet
Date:  25 July 1873
Classmark:  University of British Columbia Library, Rare Books and Special Collections (Darwin - Burdon Sanderson letters RBSC-ARC-1731-1-11)
Letter no:  DCP-LETT-8987

From J. S. Burdon Sanderson   28 July [1873]



A hasty answer to CD’s letter [8987] of 25 July. Mentions Dr Osler’s observations on behaviour of colourless blood corpuscles in solutions of sodium and potassium salts of same strength.

Author:  John Scott Burdon Sanderson, baronet
Addressee:  Charles Robert Darwin
Date:  28 July [1873]
Classmark:  DAR 58.1: 28–9
Letter no:  DCP-LETT-8988

From Mary Treat   28 July 1873



Reports in detail on her experiments with Drosera. Finds she was mistaken in thinking D. filiformis captured only small insects.

Author:  Mary Lua Adelia (Mary) Treat
Addressee:  Charles Robert Darwin
Date:  28 July 1873
Classmark:  DAR 58.1: 30–2
Letter no:  DCP-LETT-8989

From J. T. Moggridge   30 July 1873


His preliminary results with formic acid show that it inhibits germination of several kinds of seed. It also inhibits growing of mildew, which he speculates may facilitate germination.

Author:  John Traherne Moggridge
Addressee:  Charles Robert Darwin
Date:  30 July 1873
Classmark:  DAR 171: 221
Letter no:  DCP-LETT-8990

To J. D. Hooker   31 July [1873]


Has three common garden plants of which he needs to know correct names; will send specimens as soon as he hears JDH is back.

Author:  Charles Robert Darwin
Addressee:  Joseph Dalton Hooker
Date:  31 July [1873]
Classmark:  DAR 94: 267
Letter no:  DCP-LETT-8991

From J. V. Carus   21 July [1873]


JVC’s travel plans in England. Hopes to visit CD.

Author:  Julius Victor Carus
Addressee:  Charles Robert Darwin
Date:  21 July [1873]
Classmark:  DAR 161: 83
Letter no:  DCP-LETT-8992

From Frank Chance   31 July – 7 August 1873



Gives some observations on ponies’ becoming white in winter;

on skin pigmentation and the effects of heat;

on the bristling of the hair in man.

Author:  Frank Chance
Addressee:  Charles Robert Darwin
Date:  31 July – 7 Aug 1873
Classmark:  DAR 53.1: 2–5
Letter no:  DCP-LETT-8993

From Armand de Quatrefages   8 July 1873


CD’s nomination to French Academy fails again.

Author:  Jean Louis Armand (Armand de Quatrefages) Quatrefages de Bréau
Addressee:  Charles Robert Darwin
Date:  8 July 1873
Classmark:  DAR 175: 11
Letter no:  DCP-LETT-11041

From J. B. Dunbar-Brander   [before 9 July 1873]


Offers different explanations [from CD’s in Expression] for movements of dogs after voiding, and for their turning around before lying down.

CD is also wrong in saying hares do not cry except when they suffer.

Author:  James Brander Dunbar-Brander
Addressee:  Charles Robert Darwin
Date:  [before 9 July 1873]
Classmark:  DAR 160: 279
Letter no:  DCP-LETT-8711

From Gerard Krefft   [after 12 July 1873]


JLGK’s public advocacy of Darwinism brings him into numerous arguments.

Author:  Johann Louis Gerard (Gerard) Krefft
Addressee:  Charles Robert Darwin
Date:  [after 12 July 1873]
Classmark:  DAR 169: 114
Letter no:  DCP-LETT-8959

To J. D. Hooker   1 July [1873]


Agrees with JDH on G. J. Allman’s work. Approves of JDH’s text proposing GJA for Royal Medal.

Will be proud to see General Richard Strachey at Down – a truly great man.

Specimens of Drosera are waiting to be examined.

Author:  Charles Robert Darwin
Addressee:  Joseph Dalton Hooker
Date:  1 July [1873]
Classmark:  DAR 94: 265–6
Letter no:  DCP-LETT-8960

From Hermann Müller   1 July 1873



Sends a note on R. Caspary’s observations of Corydalis self-fertilisation [see Cross and self-fertilisation, p. 331].

Has begun his experiments on the self- and cross-fertilised flowers.

Author:  Heinrich Ludwig Hermann (Hermann) Müller
Addressee:  Charles Robert Darwin
Date:  1 July 1873
Classmark:  DAR 76: B184
Letter no:  DCP-LETT-8961

To Friedrich Max Müller   3 July 1873


Thanks FMM for his "Lectures [on Mr Darwin’s philosophy of language", Fraser’s Mag. n.s. 7 (1873): 525–41, 659–78].

CD is not worthy to be FMM’s adversary as he knows very little about language and, being fully convinced man is descended from some lower animal, he is forced to believe a priori that language has developed from inarticulate cries.

Author:  Charles Robert Darwin
Addressee:  Friedrich Max Müller
Date:  3 July 1873
Classmark:  DAR 146: 425
Letter no:  DCP-LETT-8962
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