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Birt, William Radcliffe in correspondent 
1850-1859::1850::01::19 in date 
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From:
William Radcliffe Birt
To:
Sir John Herschel
Date:
[19 January 1850]
Source of text:
RS:HS 4.138
Summary:

Regarding the luminous rings recently observed in the solar system.

Contributor:
John Herschel Project