Search: Herschel, John in correspondent 
Welsh, John in correspondent 
1850-1859 in date 
Sorted by:

Showing 13 of 3 items

From:
John Welsh
To:
Sir John Herschel
Date:
[15 July 1856]
Source of text:
RS:HS 18.139
Summary:

Describes R.S.L.'s compound magnet. Recommends cleaning and remagnetizing. Awaits JH's instructions.

Contributor:
John Herschel Project
From:
John Welsh
To:
Sir John Herschel
Date:
[13 April 1857]
Source of text:
RS:HS 18.140
Summary:

Reliability of barometer and thermometer measurements from balloons. Compares results of several European observers. Suggests new expedition to Teneriffe [Canary Islands].

Contributor:
John Herschel 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
Document type
Transcription available