Search: Herschel, John in correspondent 
Schumacher, Heinrich Christian in correspondent 
1820-1829::1824 in date 
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Herschel8205

From:
Sir John Herschel
To:
Heinrich Christian Schumacher
Date:
[15 January 1824]
Source of text:
RS:HS 19.11
Summary:

Orders missing issues of Astronomische Nachrichten. Answers HS's question about JH's essay on Physical Astronomy. James South's testimony 'vindicated' Josef Fraunhofer's repeating micrometer to Edward Troughton. C. F. Gauss's mode of determining powers of telescopes. Nothing heard of Captain [Maughan?]. Directions for sending [K. L.] 'Harding's atlas' to JH. Gives J. F. Daniell's address. Astronomical Society is gratified that HS dedicated book to it. Shall direct Robert Molyneux to send L. A. Fallon's clock to HS.

Contributor:
John Herschel Project

Herschel2881

From:
Heinrich Christian Schumacher
To:
Sir John Herschel
Date:
[20 January 1824]
Source of text:
RS:HS 15.372
Summary:

Will forward Astronomische Nachrichten to JH and Astronomical Society. Comments on quality of [Joseph] Fraunhofer's micrometer, which has only the wires illuminated. [C. F.] Gauss uses a theodolite to determine the angle of the telescope.

Contributor:
John Herschel Project
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