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Herschel2060

From:
Henry Raper
To:
Sir John Herschel
Date:
[4 May 1839]
Source of text:
RS:HS 14.302
Summary:

Writing at suggestion of [Francis] Beaufort. Needs information concerning [J. A.] Lloyd's observations concerning longitude of his observatory at Mauritius. Encloses prospectus of forthcoming work.

Contributor:
John Herschel Project

Herschel7302

From:
Pompilio Decuppis
To:
Sir John Herschel
Date:
[4 May 1839]
Source of text:
RS:HS 6.481
Summary:

Discusses elements of telescopic mirror making, including the curving the glass. Inquires about methods of telescope, lens, and mirror makers in England.

Contributor:
John Herschel Project
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