From:
Sir John Herschel
To:
Georg Adolph Erman
Date:
[12 October 1870]
Source of text:
RS:HS 25.7.7
Summary:
Corrects a misunderstanding about the date to which magnetic observations are to be reduced.
Contributor:
John Herschel Project
Showing 1–1 of 1 item
Corrects a misunderstanding about the date to which magnetic observations are to be reduced.