From:
Sir John Herschel
To:
David Brewster
Date:
[31 January 1824]
Source of text:
RS:HS 20.175 (C draft: 20.174)
Summary:
JH's theory of colors. Edward Troughton has DB's instrument one-third completed. When will DB want JH's encyclopedia article on 'Variation'?
Contributor:
John Herschel Project