From:
John Henry Griesbach
To:
Sir John Herschel
Date:
[29 December 1845]
Source of text:
RS:HS 9.61
Summary:
Did not realize that JH would leave town so quickly. Cast a 10" speculum successfully after William Parsons' (3rd Earl of Rosse) plan. Is having difficulty with his grinding and polishing and would welcome JH's advice.
Contributor:
John Herschel Project