Search: 1850-1859::1857::07::20 in date 
Sorted by:

Showing 1–2 of 2 items

Text Online

FVM-57-07-20

From:
Ferdinand von Mueller
To:
David Moore
Date:
20 July 1857
Source of text:
No. 3621, unit 3, p. 171, VPRS 963 correspondence register, VA 669 Public Works Department, Public Record Office, Victoria
Summary:

No summary available.

Contributor:
Correspondence of Ferdinand von Mueller Project

DCP-LETT-2125

From:
Charles Robert Darwin
To:
Asa Gray
Date:
20 July [1857]
Source of text:
Archives of the Gray Herbarium, Harvard University (9b)
Summary:

Believes species have arisen, like domestic varieties, with much extinction, and that there are no such things as independently created species. Explains why he believes species of the same genus generally have a common or continuous area; they are actual lineal descendants.

Discusses fertilisation in the bud and the insect pollination of papilionaceous flowers. His theory explains why, despite the risk of injury, cross-fertilisation is usual in the animal and vegetable kingdoms, even in hermaphrodites.

Contributor:
Darwin Correspondence Project
Author
Addressee
Correspondent
Date
Document type
Repository
Contributor
Transcription available