Search: Herschel, John in author 
1850-1859::1853::06::20 in date 
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From:
Sir John Herschel
To:
George Biddell Airy
Date:
[20 June 1853]
Source of text:
RGO 6.341.43
Summary:

Informs GA of the discovery of an earlier standard pound weight found at the Royal Mint.

Contributor:
John Herschel Project