From:
Frederick Howlett
To:
Sir John Herschel
Date:
[27 April 1864]
Source of text:
RS:HS 10.17
Summary:
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?
Contributor:
John Herschel Project