From:
Sir John Herschel
To:
J. E. Bidwell
Date:
[23 December 1841]
Source of text:
RS:HS 5.62 & 22.104
Summary:
Regarding the advisability of purchasing a patent in the photographic process.
Contributor:
John Herschel Project
Showing 1–1 of 1 item
Regarding the advisability of purchasing a patent in the photographic process.