From:
Frederic J. Jackson
To:
Sir John Herschel
Date:
[23 March 1868]
Source of text:
TxU:H/M-0292; Reel 1087
Summary:
Responds to JH's critique of FJ's theory of construction of musical scale.
Contributor:
John Herschel Project
From:
Charles Robert Darwin
To:
William Robert Grove
Date:
23 Mar [1868]
Source of text:
Royal Institution of Great Britain (Grove Papers)
Summary:
Arranges to call on WRG.
Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Albrecht Carl Ludwig Gotthilf (Albert) Günther
Date:
23 Mar [1868]
Source of text:
Shrewsbury School, Taylor Library
Summary:
Asks AG for details of variation in patterning of the banded snake.
Contributor:
Darwin Correspondence Project
From:
Albrecht Carl Ludwig Gotthilf (Albert) Günther
To:
Charles Robert Darwin
Date:
[c. 23 Mar 1868?]
Source of text:
DAR 82.2: 25
Summary:
Note on sexual differences in Monacanthus.
Contributor:
Darwin Correspondence Project
From:
Ernst Philipp August (Ernst) Haeckel
To:
Charles Robert Darwin
Date:
23 Mar 1868
Source of text:
DAR 166: 47
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.
Contributor:
Darwin Correspondence Project
Text Online
From:
Alfred Russel Wallace
To:
Charles Lyell
Date:
23 March 1868
Source of text:
John Murray Archive, National Library of Scotland: MS.41233
Summary:
No summary available.
Contributor:
Alfred Russel Wallace Correspondence Project
From:
John Jenner Weir
To:
Charles Robert Darwin
Date:
23 Mar 1868
Source of text:
DAR 84.1: 61–4
Summary:
Relates a variety of facts about sexual selection in birds. [See Descent 2: 104–5.]
Contributor:
Darwin Correspondence Project
