From:
B. W. S. Vallack
To:
Sir John Herschel
Date:
[18 November 1865]
Source of text:
RS:HS 17.415
Summary:
Comments on George Witt's work on silvering glass mirrors and on JH's Telescope. States problems with his Newtonian telescope. Works on designs for a binocular telescope.
Contributor:
John Herschel Project