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 1–2 of 2 items
More on the construction of a good optical eyepiece for solar observations [see FH's 1864-4-27].
Hopes the JH's are all well. Would like an eye-piece made by Mr. Cook[e] or any leading optician on the principles of JH as laid down in his paper in R.S.P.T. Shall he refer the optician to this paper?