From:
George Biddell Airy
To:
Sir John Herschel
Date:
[4 May 1848]
Source of text:
RS:HS 1.200 (C: RGO 6.160.29)
Summary:
Regarding the reinstatement of the zenith tube.
Contributor:
John Herschel Project
Showing 1–2 of 2 items
Regarding the reinstatement of the zenith tube.
Further information on the zenith tube. Description of a zenith tube.