From:
Edward Sabine
To:
Sir John Herschel
Date:
[12 October 1840]
Source of text:
RS:HS 15.107
Summary:
Has requested John Caldecott to do what is needful to his own and [Louis] Agassiz's actinometers. Mentions great magnetic disturbances in June are not correlated in Toronto, Greenwich, and other observatories. Mentions proposal for correlation of observations between U.S. and Britain. ES leaves soon for Guernsey.
Contributor:
John Herschel Project