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de La Rue, Warren in addressee 
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Herschel6832

From:
Sir John Herschel
To:
Warren de La Rue
Date:
[27 August 1859]
Source of text:
RS:HS 23.272
Summary:

Requests information about specula for telescopes, especially silvered glass ones.

Contributor:
John Herschel Project

Herschel6833

From:
Sir John Herschel
To:
Warren de La Rue
Date:
[8 November 1859]
Source of text:
RS:HS 23.284
Summary:

Further questions about the physical optics of telescopes [see JH's 1859-8-27].

Contributor:
John Herschel Project
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