From:
Sir William Pole
To:
Sir John Herschel
Date:
[17 November 1856]
Source of text:
RS:HS 14.20
Summary:
Thanks JH for note explaining colored glasses and 'positive' colors, saying WP only had a chance to do experiments with 'negative' colors thus far. Accepts JH's invitation to visit.
Contributor:
John Herschel Project