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Herschel, John in addressee 
letter in document-type 
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1840-1849::1848::11::30 in date 
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From:
Augustus De Morgan
To:
Sir John Herschel
Date:
[30 November 1848]
Source of text:
RS:HS 6.247
Summary:

Has been hunting JH's proposition through the books and finds that it has dropped out of use, though the older geometrical books include it.

Contributor:
John Herschel Project
From:
John Stevens Henslow
To:
Sir John Herschel
Date:
[30 November 1848]
Source of text:
RS:HS 9.311
Summary:

Received his letter just as he was about to lecture. Regarding the Institution, there are five or six telescopes in use and G. B. Airy is to deliver lectures, so JH's work may be useful.

Contributor:
John Herschel Project