From:
Alfred Smee
To:
Sir John Herschel
Date:
[2 December 1842]
Source of text:
RS:HS 16.158
Summary:
About chemical solutions used in photography, and problems produced by impurities in photographic paper.
Contributor:
John Herschel Project
Showing 1–2 of 2 items
About chemical solutions used in photography, and problems produced by impurities in photographic paper.
Thanks JH for a specimen of 'mercury type,' which AS describes as he examined it under a microscope.