Search: Herschel, John in author 
1820-1829::1823::08 in date 
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Herschel4055

From:
Sir John Herschel
To:
Caroline Lucretia Herschel
Date:
[1 August 1823]
Source of text:
TxU:H/L-0568; Reel 1058
Summary:

Researching double stars. Comparing his finding to William Herschel's, finds that most are compatible. The 40-ft. reflector is unusable, but hopes to try the 20-ft. Heard that WH's papers will be translated into German; wishes Johann Pfaff to undertake it. Asks CH to send him a copy of the finished translation.

Contributor:
John Herschel Project

Herschel8193

From:
Sir John Herschel
To:
Pierre Simon Laplace
Date:
[15 August 1823]
Source of text:
National Maritime Museum (AAbs: RS:HS 19.7)
Summary:

Letter of introduction to Mr. Robison, son of Edinburgh professor. Thanks PL for sending JH books 11 and 12 of LP's Mécanique céleste. Hopes to see PL's 'perturbations of Ceres and [J. F.] Encke's Comet.' JH's and James South's work on double stars verified views PL once held. Hopes François Arago will publish observations of double stars.

Contributor:
John Herschel Project
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