From:
Sir John Herschel
To:
Photographic News
Date:
[22 October 1864]
Source of text:
TxU:H/L-0304 & -0305.2; Reel 1054
Summary:
Notes introduction of 'Worthytype' process into commercial photography. Calls attention to process discovered by JH in 1832 for purifying uranium.
Contributor:
John Herschel Project