From:
Herbert Spencer
To:
Sir John Herschel
Date:
[31 December 1859]
Source of text:
RS:HS 16.486
Summary:
[Responding to JH's 1859-1-16,] HS defends the nebular hypothesis, HS's theory of comets, and sets out HS's theory of sunspot formation, noting that John Tyndall supports it.
Contributor:
John Herschel Project