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Haeckel, Ernst in author 
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From:
Ernst Philipp August (Ernst) Haeckel
To:
Charles Robert Darwin
Date:
6 July 1870
Source of text:
DAR 166: 54
Summary:

Discusses applicability of evolutionary theory to the question of human origins.

Describes revisions in 2d edition of Natürliche Schöpfungsgeschichte.

His research on calcareous sponges.

Mentions evolutionary content in Gegenbaur’s Vergleichende Anatomie [2d ed. (1870)].

Contributor:
Darwin Correspondence Project
From:
Ernst Philipp August (Ernst) Haeckel
To:
Charles Robert Darwin
Date:
24 Feb 1871
Source of text:
DAR 166: 55
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.

Contributor:
Darwin Correspondence Project
From:
Ernst Philipp August (Ernst) Haeckel
To:
Charles Robert Darwin
Date:
21 Dec 1871
Source of text:
DAR 166: 56
Summary:

Comments on Die Kalkschwämme [1872].

A Franciscan prior, Padre Buona-Grazia, agrees with human descent.

His trip to Dalmatia.

German reception of Descent.

Mentions current work.

Contributor:
Darwin Correspondence Project
From:
Ernst Philipp August (Ernst) Haeckel
To:
Charles Robert Darwin
Date:
1 Mar 1872
Source of text:
DAR 166: 57
Summary:

Thanks CD for Origin, 6th ed.

Has declined chair at Strasbourg.

Describes research on calcareous sponges.

Criticises Pangenesis.

Contributor:
Darwin Correspondence Project
From:
Ernst Philipp August (Ernst) Haeckel
To:
Charles Robert Darwin
Date:
12 Oct 1872
Source of text:
DAR 166: 58
Summary:

Much experiment and observation needed before spontaneous generation will be empirically advanced, but philosophically the matter is clear.

Thinks Ludwig Rütimeyer has attacked EH to satisfy pious opinion in Basel.

Will soon be finished with his monograph Die Kalkschwämme [1872].

Contributor:
Darwin Correspondence Project
From:
Ernst Philipp August (Ernst) Haeckel
To:
Charles Robert Darwin
Date:
10 Dec 1872
Source of text:
DAR 166: 34, 59
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].

Contributor:
Darwin Correspondence Project
From:
Ernst Philipp August (Ernst) Haeckel
To:
Charles Robert Darwin
Date:
23 Feb 1873
Source of text:
DAR 166: 60
Summary:

Thanks CD for comments on Die Kalkschwämme.

Plans trip to Greece, Asia Minor, and Egypt.

Discusses work of a Polish translator, Ludwik Masłowski.

Contributor:
Darwin Correspondence Project
From:
Ernst Philipp August (Ernst) Haeckel
To:
Charles Robert Darwin
Date:
8 Oct 1873
Source of text:
DAR 166: 61
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.

Contributor:
Darwin Correspondence Project
From:
Ernst Philipp August (Ernst) Haeckel
To:
Charles Robert Darwin
Date:
26 Oct 1874
Source of text:
DAR 166: 62
Summary:

Thanks CD for Descent, 2d ed.

Comments on German edition of CD’s collected works.

Sales of his Anthropogenie [1874] in various countries.

Anticlericalism and progress of Darwinism in Germany.

Contributor:
Darwin Correspondence Project
From:
Ernst Philipp August (Ernst) Haeckel
To:
Charles Robert Darwin
Date:
20 Dec 1874
Source of text:
DAR 166: 63
Summary:

Discusses his Anthropogenie [1874]. Remarks on the tables.

Has CD received Friedrich von Hellwald’s Culturgeschichte [1875]?

Plans research trip to the Mediterranean.

Contributor:
Darwin Correspondence Project
From:
Ernst Philipp August (Ernst) Haeckel
To:
Charles Robert Darwin
Date:
6 June 1875
Source of text:
DAR 166: 64
Summary:

Comments on Fritz Schultze, Kant und Darwin [1875].

Describes recent activities.

Contributor:
Darwin Correspondence Project
From:
Ernst Philipp August (Ernst) Haeckel
To:
Charles Robert Darwin
Date:
7 Nov 1875
Source of text:
DAR 166: 65
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.

Contributor:
Darwin Correspondence Project
From:
Ernst Philipp August (Ernst) Haeckel
To:
Charles Robert Darwin
Date:
13 Jan 1876
Source of text:
DAR 166: 66
Summary:

Sends copy of Arabische Korallen [1876].

Comments on reception of his paper on "Gastrula" [see 10012].

Contributor:
Darwin Correspondence Project
From:
Ernst Philipp August (Ernst) Haeckel
To:
Charles Robert Darwin
Date:
31 Jan and 1 Feb 1876
Source of text:
DAR 166: 67
Summary:

Thanks CD for comments on Arabische Korallen [1876].

Comments on Monoenia darwinii [?] as a primitive sponge.

Discusses criticisms of CD’s theory by K. E. von Baer ["Über Darwin’s Lehre", in Reden 2 (1876): 235–480].

Contributor:
Darwin Correspondence Project
From:
Ernst Philipp August (Ernst) Haeckel
To:
Charles Robert Darwin
Date:
9 May 1876
Source of text:
DAR 166: 68
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.

Contributor:
Darwin Correspondence Project
From:
Ernst Philipp August (Ernst) Haeckel
To:
Charles Robert Darwin
Date:
30 Dec 1876
Source of text:
DAR 166: 69
Summary:

Describes new journal, Kosmos, to be edited by Ernst Krause. Asks CD to lend his name to journal.

Has sent Anthropogenie, 3d ed.

Will send his study [Biologische Studien, pt 2: Studien zur Gastraea-theorie (1877)] in January.

Thanks CD for hospitality at Down.

Contributor:
Darwin Correspondence Project
From:
Ernst Philipp August (Ernst) Haeckel
To:
Charles Robert Darwin
Date:
9 Feb 1877
Source of text:
DAR 166: 70
Summary:

Sends birthday wishes. Album of photographs from German admirers has been sent.

Plans trip to Mediterranean.

Contributor:
Darwin Correspondence Project
From:
Ernst Philipp August (Ernst) Haeckel
To:
Charles Robert Darwin
Date:
9 Feb 1878
Source of text:
DAR 166: 71
Summary:

Sends birthday wishes.

Discusses his work on the Challenger [expedition] Radiolaria.

Contributor:
Darwin Correspondence Project
From:
Ernst Philipp August (Ernst) Haeckel
To:
Charles Robert Darwin
Date:
9 Feb 1879
Source of text:
DAR 166: 72
Summary:

Sends birthday wishes.

Comments on progress of CD’s theory in Germany. Mentions opposition of Rudolf Virchow and his reply Freie Wissenschaft und freie Lehre [1878].

Describes research trip to Brittany and Normandy.

Research on Challenger Radiolaria.

Contributor:
Darwin Correspondence Project
From:
Ernst Philipp August (Ernst) Haeckel
To:
Charles Robert Darwin
Date:
12 July 1879
Source of text:
DAR 166: 73
Summary:

Thanks CD for comments on Freie Wissenschaft und freie Lehre [1878].

Describes work on Medusae.

Describes work on Challenger Radiolaria and publication plans.

Contributor:
Darwin Correspondence Project