From:
Sir John Herschel
To:
William Henry Sykes
Date:
[11 March 1847]
Source of text:
RS:HS 17.143 (C: RS:HS 22.308)
Summary:
Notes that actinometer observations prove faulty due to problem with instruments. Asks that WS notify Indian observatories to join others in terminating such observations until JH finds method of getting around problem.
Contributor:
John Herschel Project