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From:
Charles Robert Darwin
To:
Alfred Russel Wallace
Date:
1 May 1857
Source of text:
The British Library (Add MS 46434)
Summary:

Reports long preparation of work on how species and varieties differ. Agreement with Wallace’s conclusions as reported in Annals and Magazine of Natural History and in his letter to CD of 10 0ct [1856]. On distinction between domestic varieties and those in "a state of nature".

On mating of jaguars and leopards, the breeding of poultry, pigeons, etc.

Requests help for his experimenting on means of distribution of organic beings on oceanic islands.

Contributor:
Darwin Correspondence Project
From:
John Welsh
To:
Sir John Herschel
Date:
[1 May 1857]
Source of text:
RS:HS 18.141
Summary:

Cannot answer JH's question about electricity in heavy showers. Observations were discontinued years ago. Refers to Francis Ronalds's past experiments. Cites 1849 B.A.A.S. Rep. for map of storm observations. Notes changes in polarity of electricity during storms.

Contributor:
John Herschel Project