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Babbage, Charles in correspondent 
1810-1819::1817::10 in date 
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From:
Sir John Herschel
To:
Charles Babbage
Date:
[3 October 1817]
Source of text:
RS:HS 2.86 (C: RS:HS 20.49)
Summary:

Regarding his projected supplement. Calculus of deviations. Naming of periodical functions. [John?] Spence's manuscript.

Contributor:
John Herschel Project
From:
Charles Babbage
To:
Sir John Herschel
Date:
[22 October 1817]
Source of text:
RS:HS 2.87
Summary:

Hopes to visit him in a few days. Regarding the calculus of derivations. Periodic functions. Is taking up mineralogy.

Contributor:
John Herschel Project