Search: 1820-1829::1828 in date 
Herschel, John in correspondent 
Rogers, Alexander in correspondent 
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Herschel2157

From:
Alexander Rogers
To:
Sir John Herschel
Date:
[26 February 1828]
Source of text:
RS:HS 14.402
Summary:

Sends copy of his account of the achromatic telescope because JH did not receive the original. Constructing an achromatic telescope of 5-foot focal length.

Contributor:
John Herschel Project

Herschel2158

From:
Alexander Rogers
To:
Sir John Herschel
Date:
[12 April 1828]
Source of text:
RS:HS 14.403
Summary:

Recently received telescope from the optician. Some adjustments are necessary. [Robert] Blair has a similar idea regarding telescopes. Asks JH to mention his idea to the Astronomical Society.

Contributor:
John Herschel Project

Herschel2159

From:
Alexander Rogers
To:
Sir John Herschel
Date:
[25 April 1828]
Source of text:
RS:HS 14.404
Summary:

Gives permission to release his telescope proposal to others. Discusses the progress of the telescope. Considers modifying the arrangement of lenses.

Contributor:
John Herschel Project

Herschel2160

From:
Alexander Rogers
To:
Sir John Herschel
Date:
[18 July 1828]
Source of text:
RS:HS 14.405
Summary:

Asks JH to report how James South's telescope performs. There was a defect in the settings of the telescope. Hopes JH's method of eliminating chromatic aberration improves the microscope.

Contributor:
John Herschel Project

Herschel2161

From:
Alexander Rogers
To:
Sir John Herschel
Date:
[29 November 1828]
Source of text:
RS:HS 14.406
Summary:

Has received a letter from the Astronomical Society secretary. Worries AR may have offended JH and requests guidance. Describes performance of his telescope.

Contributor:
John Herschel Project
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