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From Hermann Müller   7 August 1875

Summary

Thanks for Insectivorous plants.

Believes Lepidoptera are of greater importance as fertilisers in alpine regions than in lowlands.

The famous stone pits of Ohningen are for sale.

Author:  Heinrich Ludwig Hermann (Hermann) Müller
Addressee:  Charles Robert Darwin
Date:  7 Aug 1875
Classmark:  DAR 171: 304
Letter no:  DCP-LETT-10110

From Hermann Müller   23 October 1875

Summary

Is glad CD is working on cross- and self-fertilisation; reports recent works of botanists, notably Thomas Meehan’s ["Are insects any material aid to plants in fertilisation?", Philadelphia Press 13 Aug 1875], in which the importance of cross-fertilisation is denied.

Author:  Heinrich Ludwig Hermann (Hermann) Müller
Addressee:  Charles Robert Darwin
Date:  23 Oct 1875
Classmark:  DAR 171: 305
Letter no:  DCP-LETT-10219

To Hermann Müller   26 October 1875

Summary

On HM’s Befruchtung der Blumen [1873].

Author:  Charles Robert Darwin
Addressee:  Heinrich Ludwig Hermann (Hermann) Müller
Date:  26 Oct 1875
Classmark:  DAR 146: 436
Letter no:  DCP-LETT-10228

From Hermann Müller   16 February 1876

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Summary

Observations on hive- and humble-bees. Perforating habits differ in different individuals of the same species.

Author:  Heinrich Ludwig Hermann (Hermann) Müller
Addressee:  Charles Robert Darwin
Date:  16 Feb 1876
Classmark:  DAR 46.2: C61–2
Letter no:  DCP-LETT-10396

From Hermann Müller to Francis Darwin   16 February 1876

Summary

Sends Fritz Müller’s view that many of the pointed appendages on the tip of the maxilla of Vanessa atalanta are organs of feeling or taste.

Author:  Heinrich Ludwig Hermann (Hermann) Müller
Addressee:  Francis Darwin
Date:  16 Feb 1876
Classmark:  DAR 68: 159–60
Letter no:  DCP-LETT-10397

To Hermann Müller   7 August 1876

Summary

Comments on Fritz Müller’s article on Hedychium.

Author:  Charles Robert Darwin
Addressee:  Heinrich Ludwig Hermann (Hermann) Müller
Date:  7 Aug 1876
Classmark:  DAR 146: 437
Letter no:  DCP-LETT-10572

From Hermann Müller   4 September 1876

Summary

Bombus mastrucatus, an alpine bee, conforms to his observations that B. terrestris breaks open the flowers of Trifolium pratense. However, in the Alps, B. terrestris does not behave this way.

Gentiana species are adapted to lepidopteran cross-fertilisation.

Author:  Heinrich Ludwig Hermann (Hermann) Müller
Addressee:  Charles Robert Darwin
Date:  4 Sept 1876
Classmark:  DAR 171: 306
Letter no:  DCP-LETT-10589

From Hermann Müller   4 October 1876

Summary

He has never observed the straight line flight routes in male humble-bees that CD reports.

His last letter was in error: alpine Bombus terrestris does break into some flowers.

Author:  Heinrich Ludwig Hermann (Hermann) Müller
Addressee:  Charles Robert Darwin
Date:  4 Oct 1876
Classmark:  DAR 171: 307
Letter no:  DCP-LETT-10631

From Hermann Müller   6 December 1876

Summary

Thanks for Cross and self-fertilisation.

Fritz Müller has been appointed "Naturalista Viajante" of the Rio de Janeiro Museum, which will help his income greatly.

Author:  Heinrich Ludwig Hermann (Hermann) Müller
Addressee:  Charles Robert Darwin
Date:  6 Dec 1876
Classmark:  DAR 171: 308
Letter no:  DCP-LETT-10702

From Hermann Müller   28 December 1876

Summary

No papers on heterostyly have appeared since 1873.

Author:  Heinrich Ludwig Hermann (Hermann) Müller
Addressee:  Charles Robert Darwin
Date:  28 Dec 1876
Classmark:  DAR 171: 309
Letter no:  DCP-LETT-10736

From Hermann Müller   25 January 1877

Summary

Thanks CD for calling attention to a "considerable error" in his observations on Hottonia fertility [in Die Befruchtung der Blumen (1873)]. [See Forms of flowers, p. 52.]

Author:  Heinrich Ludwig Hermann (Hermann) Müller
Addressee:  Charles Robert Darwin
Date:  25 Jan 1877
Classmark:  DAR 110: A26–7
Letter no:  DCP-LETT-10815

From Hermann Müller   2 April 1877

Summary

Is pleased that CD agrees with HM’s suggestions and criticisms of CD’s work. Will undertake experiments with Viola tricolor seeds to see if they produce both large- and small-flowered plants.

Author:  Heinrich Ludwig Hermann (Hermann) Müller
Addressee:  Charles Robert Darwin
Date:  2 Apr 1877
Classmark:  DAR 111: A88
Letter no:  DCP-LETT-10921

To Hermann Müller   1 January [1878]

Summary

Thanks HM for his review [of Forms of flowers, Kosmos 2 (1877–8): 286].

Thinks HM’s previous article was very important [Kosmos 2 (1877–8): 128–40]. CD will "heartily rejoice" if HM has explained the steps by which Rhamnus and Valeriana have been rendered dioecious.

Author:  Charles Robert Darwin
Addressee:  Heinrich Ludwig Hermann (Hermann) Müller
Date:  1 Jan [1878]
Classmark:  DAR 146: 438
Letter no:  DCP-LETT-11307

From Hermann Müller   5 July 1878

Summary

Reports results of crosses between the two forms of Viola tricolor: 1. Female small flower crossed with male large flower yields all small flowers (cleistogamous self-fertilisation suspected); 2. Male small flower crossed with female large yields intermediate flowers; 3. Large flower crossed with large flower yields self-sterility symptoms.

Author:  Heinrich Ludwig Hermann (Hermann) Müller
Addressee:  Charles Robert Darwin
Date:  5 July 1878
Classmark:  DAR 171: 310
Letter no:  DCP-LETT-11592

To Hermann Müller   20 September 1878

Summary

Writing on vegetable physiology.

Nothing in CD’s life has ever interested him more than the fertilisation of such plants as Primula and Lythrum.

Author:  Charles Robert Darwin
Addressee:  Heinrich Ludwig Hermann (Hermann) Müller
Date:  20 Sept 1878
Classmark:  DAR 146: 439
Letter no:  DCP-LETT-11698

From Hermann Müller   25 September 1878

Summary

Thanks CD for his efforts to get HM’s book, Die Befruchtung der Blumen [1873], translated into English. [See Fertilisation of flowers, translated by D’Arcy W. Thompson, preface by C. Darwin (1883).]

Will soon return to his observations on insects in general and bees in particular.

Author:  Heinrich Ludwig Hermann (Hermann) Müller
Addressee:  Charles Robert Darwin
Date:  25 Sept 1878
Classmark:  DAR 171: 311
Letter no:  DCP-LETT-11710

To Hermann Müller   12 February [1879]

Summary

Has just heard that HM has been treated shamefully by his Government. What has happened?

Author:  Charles Robert Darwin
Addressee:  Heinrich Ludwig Hermann (Hermann) Müller
Date:  12 Feb [1879]
Classmark:  DAR 146: 440
Letter no:  DCP-LETT-11876

From Hermann Müller   12 February 1879

Summary

Seventieth birthday greetings.

Author:  Heinrich Ludwig Hermann (Hermann) Müller
Addressee:  Charles Robert Darwin
Date:  12 Feb 1879
Classmark:  DAR 171: 312
Letter no:  DCP-LETT-11878

From Hermann Müller   14 February 1879

Summary

HM’s teaching methods and his ideas are under attack in Germany along with the works of Ernst Krause.

Author:  Heinrich Ludwig Hermann (Hermann) Müller
Addressee:  Charles Robert Darwin
Date:  14 Feb 1879
Classmark:  DAR 171: 313
Letter no:  DCP-LETT-11883

To Hermann Müller   18 July 1880

Summary

Enjoyed HM’s castigation of Gaston Bonnier ["Gaston Bonniers angebliche Widerlegung der modernen Blumentheorie", Kosmos 7 (1880): 219–36].

Author:  Charles Robert Darwin
Addressee:  Heinrich Ludwig Hermann (Hermann) Müller
Date:  18 July 1880
Classmark:  DAR 146: 441
Letter no:  DCP-LETT-12473
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letter (53)
Correspondent
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