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From Ernst Haeckel   7 November 1875

Summary

Thanks CD for Climbing plants and Insectivorous plants.

Discusses his research on phylogeny. Results described in "Die Gastrula und die Eifurchung der Tiere" [Jena. Z. Naturw. 9 (1875): 402–508].

Describes newly discovered coral.

Author:  Ernst Philipp August (Ernst) Haeckel
Addressee:  Charles Robert Darwin
Date:  7 Nov 1875
Classmark:  DAR 166: 65
Letter no:  DCP-LETT-10246

Matches: 1 hit

From Ernst Haeckel   29 September 1869

Summary

Thanks CD for assistance concerning sponge specimens. Mentions Englishmen who have sent specimens. J. S. Bowerbank has not answered requests.

Sends articles dealing with sponges and Medusae. Cites passages for CD to read. Suggests passages from Entwicklungsgeschichte der Siphonophoren [1869].

Describes meeting with Sars and his trip to Norway.

Author:  Ernst Philipp August (Ernst) Haeckel
Addressee:  Charles Robert Darwin
Date:  29 Sept 1869
Classmark:  DAR 166: 53
Letter no:  DCP-LETT-6917

Matches: 1 hit

From Ernst Haeckel   8 October 1873

Summary

On CD’s paper ["Complemental males of certain cirripedes", Collected papers 2: 177–82].

Comments on paper by W. H. Dallinger and J. J. Drysdale ["Life history of a Cercomonad", Mon. Microsc. J. 10 (1873): 53–8].

Discusses origin of life, the Gastraea theory and concept that primary germ layers are homologous in all animals. Notes similar views of E. Ray Lankester ["On the primitive cell-layers of the embryo", Ann. & Mag. Nat. Hist. 4th ser. 11 (1873): 321–38].

Reception of Darwinism in Germany.

Author:  Ernst Philipp August (Ernst) Haeckel
Addressee:  Charles Robert Darwin
Date:  8 Oct 1873
Classmark:  DAR 166: 61
Letter no:  DCP-LETT-9091

Matches: 1 hit

From Ernst Haeckel   1 March 1872

Summary

Thanks CD for Origin, 6th ed.

Has declined chair at Strasbourg.

Describes research on calcareous sponges.

Criticises Pangenesis.

Author:  Ernst Philipp August (Ernst) Haeckel
Addressee:  Charles Robert Darwin
Date:  1 Mar 1872
Classmark:  DAR 166: 57
Letter no:  DCP-LETT-8232

Matches: 1 hit

From Ernst Haeckel   23 March 1868

Summary

Has received English edition of Variation. First volume of German edition came three months ago. Comments on book.

Will send copy of recent lectures on human evolution [Entstehung des Menschengeschlechts (1868)]. Gegenbaur much interested in the subject.

Considers Selachius the ancestral form of the fish and hence of all higher vertebrates. Believes their swim-bladder became lung of amphibians.

Mentions cases of hybrid crosses between rabbits and hares producing fertile offspring.

Author:  Ernst Philipp August (Ernst) Haeckel
Addressee:  Charles Robert Darwin
Date:  23 Mar 1868
Classmark:  DAR 166: 47
Letter no:  DCP-LETT-6040

Matches: 1 hit

From Ernst Haeckel   22 June 1868

Summary

Thanks CD for article by G. H. Lewes ["Mr Darwin’s hypotheses, pt 1", Fortn. Rev. n.s. 3 (1868): 353–73]. Comments on article.

Describes hybridisation experiment carried out on rabbits and hares by Dr Conrad.

Encloses description of Monera

and a phylogenetic table of vertebrates.

Mentions work on Medusae.

The controversy over CD in Germany.

Author:  Ernst Philipp August (Ernst) Haeckel
Addressee:  Charles Robert Darwin
Date:  22 June 1868
Classmark:  DAR 166: 48
Letter no:  DCP-LETT-6255

Matches: 1 hit

From Ernst Haeckel   9 May 1876

Summary

Sends Die Perigenesis der Plastidule [1876]. Comments on CD’s theory of Pangenesis. Explains his own theory of Perigenesis.

Returns Webb and Berthelot, Îles Canaries; Géographie botanique [1840].

Describes work on 3d ed. of Anthropogenie.

Author:  Ernst Philipp August (Ernst) Haeckel
Addressee:  Charles Robert Darwin
Date:  9 May 1876
Classmark:  DAR 166: 68
Letter no:  DCP-LETT-10501

Matches: 1 hit

From Ernst Haeckel   11 November 1865

Summary

Has heard from Huxley that CD has been ill.

Progress on his book [Generelle Morphologie (1866)] has been slow.

Has been named "ordentlicher Professor". Has 150 listeners in his lectures on CD’s theory.

Thanks CD for copy [of "Climbing plants"].

Sends his book [Beiträge zur Naturgeschichte der Hydromedusen, 1. Heft: Die Familie der Rüsselquallen (Geryonidae) (1865)] and two articles.

Calls attention to a new rhizopod from Nice.

Author:  Ernst Philipp August (Ernst) Haeckel
Addressee:  Charles Robert Darwin
Date:  11 Nov 1865
Classmark:  DAR 166: 40
Letter no:  DCP-LETT-4934

Matches: 1 hit

To Ernst Haeckel   [after 10] August – 8 October [1864]

Summary

Can understand EH’s feelings on death of his wife.

CD was impressed by manner in which species in South America are replaced by closely allied ones, by affinity of species inhabiting islands near S. America, and by relation of living Edentata and Rodentia to extinct species. When he read Malthus On population, the idea of natural selection flashed on him.

Agrees with EH’s remarks on Kölliker ["Darwin’sche Schöpfungstheorie", Z. Wiss. Zool. 14 (1864): 174–86].

Asks EH to thank Carl Gegenbaur [for Vergleichende Anatomie der Wirbelthiere (1864)].

Author:  Charles Robert Darwin
Addressee:  Ernst Philipp August (Ernst) Haeckel
Date:  [after 10] Aug – 8 Oct [1864]
Classmark:  Ernst-Haeckel-Haus (Bestand A–Abt. 1: 1–52/5)
Letter no:  DCP-LETT-4631

Matches: 2 hits

  • Darwin, C. R. Haeckel, Ernst …
  • R. C. Stauffer. Cambridge: Cambridge University Press. 1975. Notebooks : Charles Darwin’s …

From Ernst Haeckel   24 February 1871

Summary

Received copy of Descent.

Discusses CD’s comments on EH’s work.

Speculates about reception by press and scientists.

Remarks on sexual selection;

on human relationship to catarrhine apes.

Has rejected offer of chair at Vienna.

Compares Jena to Down.

Describes growth of his salary.

Mentions birth of Emma Haeckel.

A. M. Norman’s collection of calcareous sponges is very valuable.

Author:  Ernst Philipp August (Ernst) Haeckel
Addressee:  Charles Robert Darwin
Date:  24 Feb 1871
Classmark:  DAR 166: 55
Letter no:  DCP-LETT-7510

Matches: 1 hit

From Ernst Haeckel   10 December 1872

Summary

Thanks CD for Expression.

Describes work on Die Kalkschwämme and its principal conclusions.

The application of biogenetic law.

Notes variability among calcareous sponges.

Gastrula-like "Gastraea" as ancestor of multicellular animals.

Posits homology between Hydra, Olynthus of calcareous sponges, and initial germ layers of higher animals.

Comments on Lubbock’s Prehistoric times [1865]

and on David Strauss’s Der alte und der neue Glaube [1872].

Author:  Ernst Philipp August (Ernst) Haeckel
Addressee:  Charles Robert Darwin
Date:  10 Dec 1872
Classmark:  DAR 166: 34, 59
Letter no:  DCP-LETT-8669

Matches: 1 hit

From Ernst Haeckel   [before 6 February 1868]

Summary

Describes his lectures on CD’s theory.

Thanks CD for copy of Variation. Comments on book.

Describes work of two protégés in Jena: Nicolas von Miklucho[-Maclay] and Anton Dohrn.

His cousin, Wilhelm Bleek, is sending an article about the origin of language.

Asks to keep book a few months longer but will return it if CD needs it [Webb and Berthelot, Histoire naturelle des Îles Canaries, vol. 3, pt 1: Géographie botanique (1840)].

Describes research on Siphonophora.

Describes life in Jena. Mentions alpine accident during wedding trip.

Author:  Ernst Philipp August (Ernst) Haeckel
Addressee:  Charles Robert Darwin
Date:  [before 6 Feb 1868]
Classmark:  DAR 166: 46
Letter no:  DCP-LETT-5840

Matches: 1 hit

From Ernst Haeckel   10 August 1864

Summary

Sends photographs of himself and his late wife [Anna Sethe]. Describes death of his wife.

Plans trip to the Alps.

Thanks CD for biographical information about himself.

Mentions Goethe as early evolutionist.

Cites Kant as early supporter of epigenesis.

Mentions criticism of CD’s theory by R. A. von Kölliker ["Über die Darwin’sche Schöpfungstheorie", Z. Wiss. Zool. 14 (1864): 174–86].

Author:  Ernst Philipp August (Ernst) Haeckel
Addressee:  Charles Robert Darwin
Date:  10 Aug 1864
Classmark:  DAR 166: 38
Letter no:  DCP-LETT-4586

Matches: 1 hit

From Ernst Haeckel   26 October 1864

Summary

Thanks CD for notes concerning the development of his ideas about the origin of species. Says August Schleicher and Carl Gegenbaur also interested.

Names new supporters of CD’s theory, including Max Schultze, Rudolf Leuckart, and Alexander Braun. Zoologists have been more interested than botanists.

He is writing a general work on the relationships among animals [Generelle Morphologie der Organismen (1866)].

Comments on Fritz Müller’s Für Darwin [1864].

Gegenbaur is revising his Grundzüge der vergleichenden Anatomie [2d ed. (1870)] to accord with evolution.

Thanks CD for copy of book on balanids [Living Cirripedia, vol. 2].

Author:  Ernst Philipp August (Ernst) Haeckel
Addressee:  Charles Robert Darwin
Date:  26 Oct 1864
Classmark:  DAR 166: 39
Letter no:  DCP-LETT-4646

Matches: 1 hit

From Ernst Haeckel   12 May 1867

Summary

Thanks CD for new edition of Origin [4th ed. (1866)].

Comments on CD’s criticism of the harsh tone of Generelle Morphologie. Thinks he may have harmed himself but not the cause. Believes a radical reform of the science necessary, and since most scientists take a prejudiced view of the matter, a vigorous attack is essential.

Describes his travels in Canaries, Spain, and France.

Author:  Ernst Philipp August (Ernst) Haeckel
Addressee:  Charles Robert Darwin
Date:  12 May 1867
Classmark:  DAR 166: 44
Letter no:  DCP-LETT-5533

Matches: 1 hit

From Ernst Haeckel   11 January 1866

Summary

Comments on CD’s health.

Discusses origin of life and differentiation of principal classes of plants and animals.

Discusses Generelle Morphologie and its chapter on embryological development.

His lectures on CD’s theory.

Asks CD for larger portrait of himself and for several copies of the small photograph. Will send photographs of German scientists in exchange.

Author:  Ernst Philipp August (Ernst) Haeckel
Addressee:  Charles Robert Darwin
Date:  11 Jan 1866
Classmark:  DAR 166: 41
Letter no:  DCP-LETT-4973

Matches: 1 hit

From Ernst Haeckel   9 [July 1864]

Summary

No book has made such a powerful impression on EH as the Origin. Most older German scholars opposed to it, but number of supporters growing among the young. Fortunately strength of religious dogmas now small among educated Germans. Situation in Jena especially favourable. Defended CD’s theory last year at Congress of German Scientists in Stettin.

Intends special study of jellyfish.

Plans general work on natural history.

Hard fate [death of Anna Sethe Haeckel] has made EH indifferent to criticism.

Colleagues August Schleicher and Carl Gegenbaur also convinced by CD’s theory.

Author:  Ernst Philipp August (Ernst) Haeckel
Addressee:  Charles Robert Darwin
Date:  9 [July 1864]
Classmark:  DAR 166: 35
Letter no:  DCP-LETT-4555

Matches: 1 hit

Document type
letter[X]
Author
Addressee
Correspondent
Darwin, C. R. (97)
Haeckel, Ernst[X]
Date
1863 (1)
1864 (9)
1865 (2)
1866 (7)
1867 (6)
1868 (12)
1869 (4)
1870 (2)
1871 (4)
1872 (5)
1873 (4)
1874 (4)
1875 (5)
1876 (10)
1877 (2)
1878 (2)
1879 (9)
1880 (3)
1881 (6)
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