From:
John Stewart
To:
Sir John Herschel
Date:
[11 June 1853]
Source of text:
Athenaeum, #1341 (July 9, 1853), 83 & Journal of the Photographic Society, 1:8
Summary:
Describes a method developed by [J. J.] Heilmann of 'taking from glass negatives positive impressions of different dimensions.' Praises JH's suggestion that public records be preserved on microscopic negatives.
Contributor:
John Herschel Project