From:
Edward Sabine
To:
Sir John Herschel
Date:
[2 July 1859]
Source of text:
TxU:H/M-0526.5; Reel 1093
Summary:
A. D. Bache reports that self-recording instruments are installed at Washington observatory and ready to begin observations. ES is making field observations to confirm changes in magnetic lines in England since ES's 1837 survey. [JH annotation: Summary of Bache's letter. Joint survey by Smithsonian Institution and U.S. Coast Survey will begin when Bache receives full instructions from Sabine.]
Contributor:
John Herschel Project