Search: 1850-1859::1850 in date 
De Morgan, Augustus in addressee 
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Herschel7007

From:
Sir John Herschel
To:
Augustus De Morgan
Date:
1850-1
Source of text:
RS:HS 23.80
Summary:

Comments on calculation by Frédéric Petit of the hyperbolic orbit of the meteor of 19 Aug. 1847.

Contributor:
John Herschel Project

Herschel7005

From:
Sir John Herschel
To:
Augustus De Morgan
Date:
[24 January 1850]
Source of text:
RS:HS 23.81
Summary:

About Henry Warburton's theorem, and the Gregorian calendar.

Contributor:
John Herschel Project

Herschel7009

From:
Sir John Herschel
To:
Augustus De Morgan
Date:
[16 March 1850]
Source of text:
RS:HS 23.85
Summary:

About JH's poor health; some problems in perspective. Having read a book on Egyptology, JH wanders off in flights of fanciful numerology.

Contributor:
John Herschel Project
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