From:
Sir John Herschel
To:
Henry Kater
Date:
[31 July 1823]
Source of text:
RS:HS 19.51 (C: RS:HS 20.165)
Summary:
'Our micrometer screws' are not in error. F. G. W. Struve's star measurements using Josef Fraunhofer's repeating micrometer agree well with JH's. So error must be in HK's observations.
Contributor:
John Herschel Project