Search: Herschel, John in correspondent 
De Morgan, Augustus in correspondent 
1860-1869::1868 in date 
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Herschel7213

From:
Sir John Herschel
To:
Augustus De Morgan
Date:
[18 April 1868]
Source of text:
RS:HS 24.215
Summary:

Comments on a number of mathematical matters, on a book on positivism, and increased sunspot activity.

Contributor:
John Herschel Project

Herschel7214

From:
Augustus De Morgan
To:
Sir John Herschel
Date:
[30 April 1868]
Source of text:
RS:HS 6.402
Summary:

JH's account of his own health is much better than he hoped for. Has he seen AD's contribution to English?

Contributor:
John Herschel Project

Herschel7215

From:
Augustus De Morgan
To:
Sir John Herschel
Date:
[19 August 1868]
Source of text:
RS:HS 6.403
Summary:

Reasons why the sun has been so hot recently. Thanks for the paper on the scale. Comments on this. Sends a mathematical problem.

Contributor:
John Herschel Project
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