From:
Heinrich Christian Schumacher
To:
Sir John Herschel
Date:
[2 August 1850]
Source of text:
RS:HS 15.410 (C: TxU:H/M-1031.2; Reel 1083)
Summary:
Alexander von Humboldt requests that JH answer questions about 'coal sacks (plur.)' [Coal Sack of the Southern heavens].
Contributor:
John Herschel Project