Search: Herschel, John in addressee 
Shadwell, Charles in author 
John Herschel in collection 
1840-1849::1847 in date 
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From:
Sir Charles Shadwell
To:
Sir John Herschel
Date:
[1 April 1847]
Source of text:
RS:HS 17.198
Summary:

Presents 'tables for facilitating the approximate prediction of occultation and eclipses for any particular place,' so that seamen without specialized backgrounds in mathematics can observe and improve hydrography.

Contributor:
John Herschel Project