From:
William Rutter Dawes
To:
Sir John Herschel
Date:
[21 July 1843]
Source of text:
TxU:H/M-0157; Reel 1087
Summary:
WD's 1843 measurements for Gamma Virginis. Used crystal micrometer for all observations, to compare with parallel wire micrometer used in past.
Contributor:
John Herschel Project