From:
Thomas Maclear
To:
Sir John Herschel
Date:
[18 December 1836]
Source of text:
RS:HS 12.98
Summary:
Definition at the Observatory last night was abominable; therefore no comparisons can be made between the stations. Much obliged for the details of the actinometer. Will call on JH later.
Contributor:
John Herschel Project