From:
Sir John Herschel
To:
Mary Somerville
Date:
[28 February 1858]
Source of text:
RS:HS 16.361 (C: RS:HS 23.224)
Summary:
Lists facts from various astronomical catalogues, such as the number of fixed, double, and binary stars. Discusses parallax. Thanks her for second edition of Physical Geography.
Contributor:
John Herschel Project