Search: Herschel, John in addressee 
1850-1859::1857::11::11 in date 
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Herschel7074

From:
Augustus De Morgan
To:
Sir John Herschel
Date:
[11 November 1857]
Source of text:
RS:HS 6.304
Summary:

Has the proofs. Gives some queries concerning them.

Contributor:
John Herschel Project

Herschel11261

From:
William Lassell
To:
Sir John Herschel
Date:
[11 November 1857]
Source of text:
RS:HS 11.152
Summary:

Thanks for his suggestions respecting the mode of observation by collimator; will give it careful consideration. Sends two photographs of the method of mounting his observation tower.

Contributor:
John Herschel Project
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