From:
George Biddell Airy
To:
Sir John Herschel
Date:
[4 December 1867]
Source of text:
TxU:H/M-0643.4 (C: RGO 6.359.548)
Summary:
Thanks JH for his clear letter [see JH's 1867-12-3] about the pound weight standards.
Contributor:
John Herschel Project