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 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
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
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 12 February 1879
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
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 |