Search: Herschel, John in correspondent 
1840-1849::1849::04::01 in date 
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Herschel13606

From:
[A. J. F.] Yvon Villarceau
To:
Sir John Herschel
Date:
[1 April 1849]
Source of text:
RS:HS 17.418
Summary:

Asks for JH's comments on YV's specific double star observations. YV presents the mathematical method he uses to calculate double star orbits, which he had presented to the Paris Académie in 1847, but it was not published.

Contributor:
John Herschel Project

Herschel6999

From:
Sir John Herschel
To:
Augustus De Morgan
Date:
1849-4
Source of text:
RS:HS 23.66
Summary:

Needs to revise Outlines Astr., and will include Ernesto Capocchi's announcement of the discovery of another planet; some further corrections of JH's double star paper.

Contributor:
John Herschel Project
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