From:
Sir William Pole
To:
Sir John Herschel
Date:
[12 November 1856]
Source of text:
RS:HS 14.19
Summary:
Gives particulars of his vision, which WP characterizes as di-chromic. Recounts experiments with red glass sent by JH to WP. Offers to visit if JH wants personal interview.
Contributor:
John Herschel Project