From:
George Biddell Airy
To:
Sir John Herschel
Date:
[24 February 1848]
Source of text:
RS:HS 1.196 (C: RGO 6.701.112)
Summary:
Regarding modifications for the actinometer. Has written to Georg Merz regarding the object-glass. Regarding the eight-inch object-glass. Name of the maker of his actinometer. [JH has written a rough draft of his reply to this letter on the same sheet.]
Contributor:
John Herschel Project