From:
Sir John Herschel
To:
George Dollond
Date:
[1 February 1823]
Source of text:
RS:HS 20.160
Summary:
Sends some calculations relating to the construction of lenses.
Contributor:
John Herschel Project
Sends some calculations relating to the construction of lenses.
Some comments on sun spots based on William Herschel's ideas; considering a collection of William Herschel's writings but publishers not interested.