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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

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   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

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

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

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

From Hermann Müller   27 April 1880

Summary

Fritz Müller’s daughter has committed suicide.

Author:  Heinrich Ludwig Hermann (Hermann) Müller
Addressee:  Charles Robert Darwin
Date:  27 Apr 1880
Classmark:  DAR 171: 314
Letter no:  DCP-LETT-12592

From Hermann Müller   14 August 1880

Summary

HM’s son will visit CD when he comes to London.

Is glad CD approves of his judgment of G. Bonnier’s paper on nectaries [Gaston Bonnier, "Les nectaires", Ann. Sci. Nat. (Bot.) 8 (1879): 5–212].

Author:  Heinrich Ludwig Hermann (Hermann) Müller
Addressee:  Charles Robert Darwin
Date:  14 Aug 1880
Classmark:  DAR 171: 315
Letter no:  DCP-LETT-12687

From Hermann Müller   27 November 1880

Summary

Movement in plants has shown him CD’s research method: 1. Find a fundamental idea of great generality (circumnutation); 2. Pursue it everywhere with observations and experiment; 3. Conduct special observations which undo any doubt of generality.

Author:  Heinrich Ludwig Hermann (Hermann) Müller
Addressee:  Charles Robert Darwin
Date:  27 Nov 1880
Classmark:  DAR 171: 317
Letter no:  DCP-LETT-12868

From Hermann Müller   30 November 1880

Summary

Fritz Müller suffered moderate damage in Brazilian flood.

Continued praise for the universal importance for botany of Movement in plants.

Author:  Heinrich Ludwig Hermann (Hermann) Müller
Addressee:  Charles Robert Darwin
Date:  30 Nov 1880
Classmark:  DAR 171: 316
Letter no:  DCP-LETT-12878

From Hermann Müller   23 March 1867

Summary

The Origin converted him from a Linnean interpretation of flowers and mosses.

Glad that CD appreciates his continuing work on mosses, in support of natural selection.

Plans to repeat CD’s orchid experiments.

Sends interpretation of the floral anatomy of Lopezia miniata.

Author:  Heinrich Ludwig Hermann (Hermann) Müller
Addressee:  Charles Robert Darwin
Date:  23 Mar 1867
Classmark:  DAR 171: 290, 290/1
Letter no:  DCP-LETT-5457

From Hermann Müller   1 April [1867]

Summary

Thanks for "Climbing plants" offprint and for references on fertilisation of flowers.

Considering the bounty of work already done, he is looking for something original to do.

Subularia does not grow in Westphalia.

Author:  Heinrich Ludwig Hermann (Hermann) Müller
Addressee:  Charles Robert Darwin
Date:  1 Apr [1867]
Classmark:  DAR 171: 289
Letter no:  DCP-LETT-5481

From Hermann Müller   23 October 1867

Summary

Thanks for German version of Origin [1867].

Dipterous insects are adapted to eating pollen rather than only to sucking nectar. He describes such adaptations in two dipteran species.

Author:  Heinrich Ludwig Hermann (Hermann) Müller
Addressee:  Charles Robert Darwin
Date:  23 Oct 1867
Classmark:  DAR 171: 291
Letter no:  DCP-LETT-5657
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Müller, Hermanndisabled_by_default
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