From:
Sir John Herschel
To:
Frederick Howlett
Date:
[30 April 1864]
Source of text:
RS:HS 24.42
Summary:
More on the construction of a good optical eyepiece for solar observations [see FH's 1864-4-27].
Contributor:
John Herschel Project
Showing 1–1 of 1 item
More on the construction of a good optical eyepiece for solar observations [see FH's 1864-4-27].