From:
Sir John Herschel
To:
Photographic News
Date:
[31 January 1868]
Source of text:
Photographic News, 12 (Jan. 31, 1868), 57
Summary:
Discusses the action of hyposulphite of ammonia on muriate of silver. Gives directions for preparing hyposulfite of silver.
Contributor:
John Herschel Project