Text Online
From:
Ernst Becker
To:
Michael Faraday
Date:
15 March 1857
Source of text:
IET MS SC 2
Summary:
No summary available.
Contributor:
Faraday Project
From:
Charles Robert Darwin
To:
Joseph Dalton Hooker
Date:
15 Mar [1857]
Source of text:
DAR 114: 193
Summary:
Separation of sexes in trees [U. S.].
Do plants offer positive evidence for "continuous land" theory?
Protean genera.
Contributor:
Darwin Correspondence Project
From:
Edward Sabine
To:
John Richardson
Date:
15 March 1857
Source of text:
MM/4/40, Royal Society
Summary:
No summary available.
Contributor:
Royal Society
From:
Sir John Herschel
To:
Edward Sabine
Date:
[15 March 1857]
Source of text:
RS:HS 23.191
Summary:
Writing article [for Encyclopaedia Britannica] on meteorology. Asks questions regarding work of [H. W.] Dove and [Thomas?] Taylor regarding cyclone and storm theory. Discusses barometric fluctuation.
Contributor:
John Herschel Project
From:
Sir John Herschel
To:
John Wrottesley
Date:
[15 March 1857]
Source of text:
RS:HS 25.12.3
Summary:
Comments on a number of resolutions of the R.S.L., as always encouraging keeping government activity at a distance.
Contributor:
John Herschel Project
From:
Thomas Archer Hirst
To:
John Tyndall
Date:
March 15th 1857
Source of text:
MS JT/1/H/231; MS JT/1/HTYP/491-2, RI
Summary:
No summary available.
Contributor:
Tyndall Project
From:
Charles Robert Darwin
To:
Asa Gray
Date:
[after 15 Mar 1857]
Source of text:
Archives of the Gray Herbarium, Harvard University (8)
Summary:
Urges AG to generalise from his observations on the flora of the northern U. S.
Expected to find separation of sexes in trees because he believes all living beings require an occasional cross, and none is perpetually self-fertilising. The multitude of flowers of a tree would be an obstacle to cross-fertilisation unless the sexes tended to be separate.
The Leguminosae are CD’s greatest opposers; he cannot find that garden varieties ever cross. Could AG inquire of intelligent nurserymen on the subject?
Thanks AG for information on protean genera; much wants to know whether their great variability is due to their conditions of existence or is innate in them at all times and places.
Contributor:
Darwin Correspondence Project