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1840-1849::1849::05::18 in date 
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Herschel13608

From:
[A. J. F.] Yvon Villarceau
To:
Sir John Herschel
Date:
[18 May 1849]
Source of text:
RS:HS 17.419
Summary:

Is sending a communication to JH for insertion in the R.A.S.M.N. Seems to be some problem with understanding YV's calculations of the orbits of double stars, so YV explains his method.

Contributor:
John Herschel Project

Herschel12493

From:
Algernon Percy (4th Duke of Northumberland)
To:
Sir John Herschel
Date:
[18 May 1849]
Source of text:
RS:HS 13.359
Summary:

Is looking forward to receiving a copy of JH's Outlines Astr.; describes an aurora AP had seen at Alnwick Castle.

Contributor:
John Herschel Project
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