From:
James Samuelson
To:
Sir John Herschel
Date:
[13 March 1864]
Source of text:
RAS:JH Archive 13/1.12; Reel 10
Summary:
Alterations to proofs of JH's plate [on sunspots]. Explains tinting process.
Contributor:
John Herschel Project
Alterations to proofs of JH's plate [on sunspots]. Explains tinting process.