Search: Herschel, John in correspondent 
Sykes, William Henry in correspondent 
1860-1869 in date 
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From:
Sir John Herschel
To:
William Henry Sykes
Date:
[24 October 1861]
Source of text:
RS:HS 17.155 (C: RS:HS 23.343)
Summary:

Stresses importance for Balloon Committee of obtaining corresponding temperatures and pressures; describes two highly sensitive thermometers that might be built for this purpose.

Contributor:
John Herschel Project
From:
William Henry Sykes
To:
Sir John Herschel
Date:
[28 October 1861]
Source of text:
RS:HS 17.156
Summary:

Updates JH on activities of Balloon Committee, and thanks him for suggestion regarding temperature measurement. Mentions improving health of Mrs. Sykes.

Contributor:
John Herschel Project
From:
William Henry Sykes
To:
Sir John Herschel
Date:
[9 January 1862]
Source of text:
RS:HS 17.157
Summary:

Invites JH to meeting of Balloon Committee and updates everything in previous letter.

Contributor:
John Herschel Project
From:
William Henry Sykes
To:
Sir John Herschel
Date:
[18 January 1862]
Source of text:
RS:HS 17.158
Summary:

Asks for JH's opinion on balloon ascents, to be presented at next Balloon Committee meeting. Explains enclosed letters and diagrams regarding ascents; mentions that new thermometer suggested by JH is under construction.

Contributor:
John Herschel Project
From:
William Henry Sykes
To:
Sir John Herschel
Date:
[7 October 1862]
Source of text:
RS:HS 17.159
Summary:

Communicates Balloon Committee's feeling that balloon should not go as high as JH suggested, despite Henry Coxwell's having safely ascended higher. Reports successful presentation of previous results, hoping that Committee will find sufficient funding to continue.

Contributor:
John Herschel Project