From:
Sir John Herschel
To:
Richard Anthony Proctor
Date:
[1 June 1870]
Source of text:
RS:HS 24.316
Summary:
Continues to explain matters in perturbation theory. Stresses need for careful observations in solar eclipses. Doubts the existence of the hypothetical intermercurial planet Vulcan.
Contributor:
John Herschel Project