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1830-1839::1830 in date 
Smyth, William Henry in addressee 
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Herschel1480

From:
Sir John Herschel
To:
William Henry Smyth
Date:
[27 May 1830]
Source of text:
APS B.Sm98.5 (C: RS:HS 21.70)
Summary:

Thanks WS for excerpt from Niccolo Cacciatore's letter; comments on the awarding of medals for merit, and points out some necessary conditions which must be considered if the observations of the satellites of Jupiter are to be used in determining the constant of aberration.

Contributor:
John Herschel Project

Herschel1481

From:
Sir John Herschel
To:
William Henry Smyth
Date:
[8 August 1830]
Source of text:
APS B.Sm98.6 (C: RS:HS 21.73)
Summary:

Advises WS on best ways to make a 'darkening glass' for solar observations. Also suggests method for delineating sunspots. Hopes WS will attend Nautical Almanac meeting and support his points. Completes two telescope mirrors and observes Uranian satellites. Asks WS to look for a double star between Beta1 and Beta2 Capricorni.

Contributor:
John Herschel Project

Herschel1482

From:
Sir John Herschel
To:
William Henry Smyth
Date:
[6 September 1830]
Source of text:
APS B.Sm98.7 (C: RS:HS 21.75)
Summary:

Discusses WS's observations of double stars and method of averaging positional determinations. Believes he has verified the two Uranian satellites observed by William Herschel.

Contributor:
John Herschel Project
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