From:
Alfred Brothers
To:
Sir John Herschel
Date:
[2 November 1864]
Source of text:
RS:HS 4.298
Summary:
Is grateful for his letter regarding the claim for the discovery of the hyposulfite fixing process.
Contributor:
John Herschel Project
Showing 1–2 of 2 items
Is grateful for his letter regarding the claim for the discovery of the hyposulfite fixing process.
Regarding the differences between portraits and photographs. Is sending him some magnesium for photographic purposes.