From:
Edward Sabine
To:
Sir John Herschel
Date:
[1840]-4-25 or later
Source of text:
RS:HS 15.331
Summary:
Hopes [Humphrey] Lloyd will reconsider V.F. Magnetometer based on JH's remarks. Discusses Canadian observatories. States who will perform U. S. magnetic survey. Discusses micrometer use.
Contributor:
John Herschel Project