From:
Christian Andreas Schumacher
To:
Sir John Herschel
Date:
[23 July 1852]
Source of text:
RS:HS 17.179
Summary:
Mentions his stay at Pulkowa Observatory in 1844 and 1845. Refers to [Alexander von] Humboldt's Kosmos. Discusses a function of prisms in telescopes.
Contributor:
John Herschel Project