From:
Sir John Herschel
To:
William Henry Sykes
Date:
[23 November 1858]
Source of text:
RS:HS 17.154 (C: RS:HS 23.246)
Summary:
Urges renewal of high balloon ascents with periodic observations both to further knowledge of law of decrement of temperature and pressure and for 'ulterior investigations.'
Contributor:
John Herschel Project