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Sykes, William Henry in correspondent 
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Herschel, John in addressee 
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From:
William Henry Sykes
To:
Sir John Herschel
Date:
[11 April 1839]
Source of text:
RS:HS 17.139
Summary:

Offers JH professorship of astronomy at Oxford and hopes to see him at meeting of Meteorological Committee.

Contributor:
John Herschel Project
From:
William Henry Sykes
To:
Sir John Herschel
Date:
[27 November 1844]
Source of text:
RS:HS 17.141
Summary:

Regrets that he cannot offer JH the information he needs regarding the stature of service-men, but suggests places for further searching. Shares observations about relationships between dew point and barometer.

Contributor:
John Herschel Project
From:
William Henry Sykes
To:
Sir John Herschel
Date:
[7 July 1845]
Source of text:
TxU:H/M-0514; Reel 1093
Summary:

Reduction of observations will begin immediately.

Contributor:
John Herschel Project
From:
William Henry Sykes
To:
Sir John Herschel
Date:
[4 November 1845]
Source of text:
RS:HS 17.142
Summary:

Expresses satisfaction with results of continued magnetic and meteorological observations in various locations.

Contributor:
John Herschel Project
From:
William Henry Sykes
To:
Sir John Herschel
Date:
[10 August 1847]
Source of text:
RAS:JH Archive 10/5.25; Reel 9
Summary:

Assures JH that [Cape Results] will receive warm welcome in libraries of India. Suggests other recipients there. Send copies with dispatches from India House.

Contributor:
John Herschel Project
From:
William Henry Sykes
To:
Sir John Herschel
Date:
[17 January 1848]
Source of text:
RS:HS 17.144a
Summary:

Requests letter ascertaining William Mann's competence, assuring his hiring as astronomer at Madras.

Contributor:
John Herschel Project
From:
William Henry Sykes
To:
Sir John Herschel
Date:
[22 March 1850]
Source of text:
RS:HS 17.145
Summary:

Regrets missing JH's visit; discusses influences of atmosphere and solar position on Indian weather and difficulty it causes in obtaining meteorological laws.

Contributor:
John Herschel Project
From:
William Henry Sykes
To:
Sir John Herschel
Date:
[19 April 1850]
Source of text:
RS:HS 17.146
Summary:

Clarifies results of pressure oscillations on two coasts of India as similar despite different weather conditions, and deems results thus unsatisfactory; explores reasons and suggests solutions for lack of success.

Contributor:
John Herschel Project
From:
William Henry Sykes
To:
Sir John Herschel
Date:
[27 April 1850]
Source of text:
RS:HS 17.147
Summary:

Discusses balloon experiments to explain fall of barometer with humidity, and explains more discrepancies in vapor-pressure observations. Mentions new 'Hygrometric condenser' as an alternative to wet bulb experiments.

Contributor:
John Herschel Project
From:
William Henry Sykes
To:
Sir John Herschel
Date:
[3 December 1850]
Source of text:
TxU:H/M-0515; Reel 1093
Summary:

Thanks for signing certificate for [C. M.] Elliott. Sends extracts from George Buist's history of heat storms in India, with evidence of great masses of ice dropped by these storms.

Contributor:
John Herschel Project
From:
William Henry Sykes
To:
Sir John Herschel
Date:
[6 July 1851]
Source of text:
TxU:H/M-0516; Reel 1093
Summary:

Glad that Dr. [Duncan] Stewart received promise from Mr. Prinsep of cadetship [in H.E.I.C.] for Stewart's son. WS cannot promise same for young [George] Maclear but will add Maclear to list of applicants for WS's patronage.

Contributor:
John Herschel Project
From:
William Henry Sykes
To:
Sir John Herschel
Date:
[13 November 1851?]
Source of text:
RS MM.16.164
Summary:

Reports on and discusses applications of hourly wet bulb observations in ocean.

Contributor:
John Herschel Project
From:
William Henry Sykes
To:
Sir John Herschel
Date:
[22 November 1851]
Source of text:
RS:HS 17.148
Summary:

Noting discrepancy between dew points obtained by wet bulb and direct methods, WS cannot say which is nearer the truth; suspects that both have inaccuracies.

Contributor:
John Herschel Project
From:
William Henry Sykes
To:
Sir John Herschel
Date:
[1852?]
Source of text:
RS MM.16.165
Summary:

Suggests possible times to meet with JH.

Contributor:
John Herschel Project
From:
William Henry Sykes
To:
Sir John Herschel
Date:
[15 January 1852]
Source of text:
RS:HS 17.149
Summary:

Agrees with papers demonstrating falsity of present methods of correcting barometer for moisture and 'dogma of one gas being a vacuum to another.'

Contributor:
John Herschel Project
From:
William Henry Sykes
To:
Sir John Herschel
Date:
[4 May 1852]
Source of text:
Harvard: Houghton AAH 67m-67 (99)
Summary:

Asks JH to look at a letter by John Forbes Watson, whose paper the R.S.L. recently refused to read.

Contributor:
John Herschel Project
From:
William Henry Sykes
To:
Sir John Herschel
Date:
[20 July? 1852]
Source of text:
RS MM.16.166
Summary:

Encloses newly-discovered proof that John Forbes Watson's wet bulb depression was not a clerical error.

Contributor:
John Herschel Project
From:
William Henry Sykes
To:
Sir John Herschel
Date:
[12 August 1852]
Source of text:
RS:HS 17.150
Summary:

Plans date and time for first ascent of balloon experiment. WS's daughter has fallen in love with JH's son William.

Contributor:
John Herschel Project
From:
William Henry Sykes
To:
Sir John Herschel
Date:
[26 October 1853]
Source of text:
RS:HS 17.151
Summary:

Describes travels abroad and their educational value, news on balloon ascents, barometer corrections, Henri Regnault's hygrometer, invention of electric weaver and other new applications of electricity throughout Europe.

Contributor:
John Herschel Project
From:
William Henry Sykes
To:
Sir John Herschel
Date:
[20 November 1858]
Source of text:
RS:HS 17.153
Summary:

Before meeting of Balloon Committee, requests JH's opinion on value of renewing balloon ascents.

Contributor:
John Herschel Project