From:
Edward Joshua Cooper
To:
Sir John Herschel
Date:
[16 September 1847]
Source of text:
RS:HS 5.286
Summary:
Encloses copies of configurations of nebulae clusters and explains his readings. Has he heard of Macedoine Melloni's water eye piece? [Andrew] Graham has invented a new micrometer.
Contributor:
John Herschel Project