From:
Edward Sabine
To:
Sir John Herschel
Date:
[3 January 1849]
Source of text:
RS:HS 15.228
Summary:
Discusses letter to [G. B.] Airy and JH's response to it. Discusses instruments at Toronto Observatory. Describes 18 November 1841 magnetic disturbances. Working on Atlantic declination maps.
Contributor:
John Herschel Project