Search: 1860-1869::1868::04::30 in date 
Sorted by:

Showing 1–8 of 8 items

DCP-LETT-6146

From:
Charles Robert Darwin
To:
Alfred Russel Wallace
Date:
30 Apr [1868]
Source of text:
The British Library (Add MS 46434: 136–9)
Summary:

More on CD’s objections to ARW’s views on protection and natural selection.

Sexual selection.

Contributor:
Darwin Correspondence Project

DCP-LETT-6147

From:
George Bentham
To:
Charles Robert Darwin
Date:
30 Apr 1868
Source of text:
DAR 160: 161
Summary:

Discusses Hildebrand

and criticises Delpino.

Asks to borrow C. K. Sprengel’s Entdeckte Geheimniss der Natur [1793].

Botanists have no explanation of the case of Viola odorata and other showy flowers being sterile while inconspicuous ones bear seed.

Contributor:
Darwin Correspondence Project
thumbnail

Herschel12826

From:
Clements R. Markham and Richard Henry Major
To:
Sir John Herschel
Date:
[1868-4-30 or earlie
Source of text:
TxU:H/L-0232.2; Reel 1054
Summary:

[Printed notice] Invitation to meetings of 'Royal Geographical Society.'

Contributor:
John Herschel Project

Herschel12828

From:
Sir John Herschel
To:
the London Times
Date:
[30 April 1868]
Source of text:
TxU:H/L-0232.6; Reel 1054
Summary:

Addresses problems in metric bill introduced to Parliament by William Ewart. Argues for the retention of the British system of weights and measures. Shows that the inch can be defined as one five hundred millionth of the length of the earth's polar axis.

Contributor:
John Herschel Project

Herschel13897

From:
Joseph Alfred Hardcastle
To:
Sir John Herschel
Date:
30 April [1868]
Source of text:
TxU:H/M-0243; Reel 1087
Summary:

Thanks for JH's notes on metric system. Will study these before Parliamentary debate on 13 May. Calculates that 63 percent of exports go to British possessions, while only 18 percent go to Continent. Sees this as argument against introducing metric system.

Contributor:
John Herschel Project

Herschel7214

From:
Augustus De Morgan
To:
Sir John Herschel
Date:
[30 April 1868]
Source of text:
RS:HS 6.402
Summary:

JH's account of his own health is much better than he hoped for. Has he seen AD's contribution to English?

Contributor:
John Herschel Project

Herschel8425

From:
Hubert Airy
To:
Sir John Herschel
Date:
[30 April 1868]
Source of text:
RS:HS 19.307
Summary:

Observations on various forms of [hemianopsia], which afflicts HA, his father [G. B. Airy], and JH. Detailed description of recent attack. Seven sketches with captions.

Contributor:
John Herschel Project
Text Online

WCP1900

From:
Charles Robert Darwin
To:
Alfred Russel Wallace
Date:
30 April [1868]
Source of text:
  • British Library, The: BL Add. 46434 ff. 136-139
  • Marchant, J. (Ed.). (1916). In: Alfred Russel Wallace; Letters and Reminiscences. Vol. 1. London & New York: Cassell & Co. [pp. 214-216]
Summary:

No summary available.

Contributor:
Alfred Russel Wallace Correspondence Project
Author
Addressee
Correspondent
Date
Document type
Repository
Contributor
Transcription available