From:
Norman Pogson
To:
Sir John Herschel
Date:
[15 April 1860]
Source of text:
RS:HS 14.4
Summary:
Has heard that JH's son [Alexander] is observing variable stars at Charles Pritchard's school. Gives latest data on these stars. Suggests other variables to observe. Has adopted JH's proposal of using Julian day numbers for dating variables in his catalogue of variables.
Contributor:
John Herschel Project