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King, Joshua in correspondent 
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From:
Joshua King
To:
Sir John Herschel
Date:
[26 February 1825]
Source of text:
RS:HS 11.83
Summary:

Has recently discovered in Cumberland a rich vein of cobalt, which is mixed with iron. Would like his opinion whether these ores can be easily separated. Can send him a specimen if required.

Contributor:
John Herschel Project
From:
Joshua King
To:
Sir John Herschel
Date:
[2 March 1825]
Source of text:
RS:HS 11.84
Summary:

Forwards a specimen of his cobalt. Gives price and the various methods of use and refining. Thinks the analysis did not show its true qualities. Would like to hear the results of JH's experiments.

Contributor:
John Herschel Project
Document type
Transcription available