Search: De Morgan, Augustus in correspondent 
1860-1869::1861::07 in date 
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Herschel7133

From:
Augustus De Morgan
To:
Sir John Herschel
Date:
[1 July 1861]
Source of text:
RS:HS 6.346
Summary:

Has not heard from him for a long time. Did he receive his red and black logarithms? JH's son Alexander has sent him a mathematical problem. George Bishop has died and the observatory and instruments are to be sold. Sends two riddles. Sees that JH has proved that the sun is liquid fire.

Contributor:
John Herschel Project

Herschel7134

From:
Sir John Herschel
To:
Augustus De Morgan
Date:
[14 July 1861]
Source of text:
RS:HS 23.334
Summary:

Raised from his lethargy by the appearance of the comet; comments on the nature of the sun; can AD recommend a book on surveying for JH's son John.

Contributor:
John Herschel Project

Herschel7135

From:
Augustus De Morgan
To:
Sir John Herschel
Date:
[15 July 1861]
Source of text:
RS:HS 6.347
Summary:

Sends a sonnet on the comet. Regarding works on spheroidal triangles. Supposes he may use the Feldhausen anecdote. Regarding the law of facility.

Contributor:
John Herschel Project
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