From:
William Selwyn
To:
Sir John Herschel
Date:
[19 March 1861]
Source of text:
RS:HS 15.465
Summary:
Discusses 'autograph of the sun' he sent earlier. Discusses measuring relative temperature of sun. Has an unpublished letter of Galileo to Cardinal Barberini regarding sunspots.
Contributor:
John Herschel Project