From:
George Biddell Airy
To:
Sir John Herschel
Date:
[3 June 1856]
Source of text:
RS:HS 1.231
Summary:
Has procured an actinometer and would like details of the scale.
Contributor:
John Herschel Project
Has procured an actinometer and would like details of the scale.
Some more information on the use of the actinometer [see JH's 1856-4-24 & GA's 1856-6-3]; some news of JH's wife, Margaret.