From:
Sir John Herschel
To:
Photographic News
Date:
[30 June 1860]
Source of text:
Photographic News, 4 (1860), 118
Summary:
[Writing under the pseudonym 'Redde Suum Cuique'], JH notes that a recently published process for recovering silver from old plate was in fact anticipated by James Keir in a 1790 R.S.P.T. paper. Attacks a recent misuse of the word 'actinometer.'
Contributor:
John Herschel Project