From:
Sir John Herschel
To:
Frederick Howlett
Date:
[7 April 1871]
Source of text:
RS:HS 24.361
Summary:
Is at present too ill to involve himself in any calculations necessary for making a good optical eyepiece.
Contributor:
John Herschel Project
Showing 1–3 of 3 items
Is at present too ill to involve himself in any calculations necessary for making a good optical eyepiece.
Is anxious to have an astronomical eye-piece based on JH's principles. Encloses communication from Messrs. Horne and Thornthwaite, who would like details for their employee, [W.?] Ackland, to work from.
Is grateful for his reply. Hopes he is feeling better. Escaped worst of the winter by expedition to Algeria, though the results were disappointing. Comments on some of his observations. Feels sure [W.?] Ackland will be able to construct a suitable eyepiece.