Search: Herschel, John in author 
1830-1839::1831::05 in date 
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Herschel1016

From:
Sir John Herschel
To:
William Rutter Dawes
Date:
[1 May 1831]
Source of text:
RS:HS 25.2.5
Summary:

Is very pleased with the results of WD's double star observations of Zeta Cancri, which William Stratford forwarded to JH.

Contributor:
John Herschel Project

Herschel1017

From:
Sir John Herschel
To:
Francis Baily
Date:
[13 May 1831]
Source of text:
RS:HS 25.2.6
Summary:

Suggests an improvement in measuring techniques for astronomical observations, by making the angular measurement by direct and then reflected vision. JH wonders whether this idea might be appended to a paper currently under consideration by the R.A.S.

Contributor:
John Herschel Project

Herschel9077

From:
Sir John Herschel
To:
William Whewell
Date:
[16 May 1831]
Source of text:
TC, Camb. Add. Ms.a.20720 (C: RS:HS 21.81)
Summary:

Is sending WW a large collection of writings on optics and light.

Contributor:
John Herschel Project

Herschel1018

From:
Sir John Herschel
To:
Wilhelm Struve
Date:
[17 May 1831]
Source of text:
RS:HS 25.2.7
Summary:

Discusses a variety of observations related to double stars, and asks FS to make some specific observations to compare with JH's work. Reveals JH's dream of going to the Southern Hemisphere for a number of years, but asks FS to keep it quiet, as 'many ties' stand in the way.

Contributor:
John Herschel Project

Herschel3755

From:
Sir John Herschel
To:
Caroline Lucretia Herschel
Date:
[22 May 1831]
Source of text:
TxU:H/L-0576.3; Reel 1058
Summary:

Has determined the periods of four double stars. JH considers the determination of the elliptical orbits of double stars as 'one of the greatest [discoveries] ever made.'

Contributor:
John Herschel Project

Herschel1019

From:
Sir John Herschel
To:
William Rutter Dawes
Date:
[30 May 1831]
Source of text:
RS:HS 25.2.8
Summary:

Comments with great satisfaction on WD's observations, and their close agreement with JH's for many of the same double stars.

Contributor:
John Herschel Project
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