Search: Herschel, John in correspondent 
Hall, Basil in correspondent 
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letter in document-type 
1840-1849::1840::11 in date 
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Herschel10309

From:
Basil Hall
To:
Sir John Herschel
Date:
[3 November 1840]
Source of text:
RS:HS 9.192
Summary:

Wishes JH would lay hands on the memorandum concerning the Zenith observatory on Etna. Explains why JH's theories regarding a point in gunnery do not work in actual practice. Queries the measurement given by JH for the height of Etna.

Contributor:
John Herschel Project

Herschel10310

From:
Basil Hall
To:
Sir John Herschel
Date:
[9 November 1840]
Source of text:
RS:HS 9.193
Summary:

Regarding the correct figure for the height of Etna, W. H. Smyth favors the half foot measurement. Regarding falls of stones from Vesuvius. Encloses calculations made by professor at Naval College. Remembers large balls of lava at Teneriffe.

Contributor:
John Herschel Project
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