Search: Herschel, John in correspondent 
Knowles, Francis Charles in correspondent 
Herschel, John in addressee 
No in transcription-available 
John Herschel in collection 
1850-1859 in date 
Sorted by:

Showing 12 of 2 items

From:
Francis Charles Knowles
To:
Sir John Herschel
Date:
[9 October 1856]
Source of text:
RS:HS 11.65
Summary:

Thinks it may be a good idea to utilize aluminium to coat the speculum of reflecting telescopes. Is shortly to take command of iron works and furnaces and hopes to carry out experiments to produce barytic glass.

Contributor:
John Herschel Project
From:
Francis Charles Knowles
To:
Sir John Herschel
Date:
[5 December 1856]
Source of text:
RS:HS 11.66
Summary:

Has received news of a cargo of cryolite from Greenland. Outlines the various possibilities of using it for the manufacture of chemicals and glass. Sends his method of manufacturing aluminium.

Contributor:
John Herschel Project