Search: Herschel, John in correspondent 
Shadwell, Charles in correspondent 
Herschel, John in addressee 
John Herschel Project in contributor 
No in transcription-available 
1840-1849 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
From:
Sir Charles Shadwell
To:
Sir John Herschel
Date:
[14 May 1849]
Source of text:
RS:HS 17.199
Summary:

Describes usual method for interpolation of altitudes at sea. JH's graphic method probably would be practicable.

Contributor:
John Herschel Project
Document type
Transcription available