From:
Sir John Herschel
To:
Photographic News
Date:
[20 August 1859]
Source of text:
Photographic News, 3 (Sept. 9, 1859), 2-3
Summary:
Recounts experiments JH conducted on the action of the solar spectrum on various silver salts. Explains how JH produced his solar spectrum.
Contributor:
John Herschel Project