From:
Edward Sabine
To:
Sir John Herschel
Date:
[23 July 1858]
Source of text:
TxU:H/M-0525.8; Reel 1093
Summary:
Forwards latest computations of lunar diurnal variation in horizontal force of terrestrial magnetism at Cape of Good Hope. Describes method used by Archibald Smith to distinguish lunar from terrestrial magnetism.
Contributor:
John Herschel Project