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