Search: 1850-1859::1852::03 in date 
Beaufort, Francis in addressee 
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Herschel12665

From:
Sir John Herschel
To:
Francis Beaufort
Date:
23 March [1852]
Source of text:
TxU:H/L-0086 & L-0085; Reel 1054
Summary:

Suggestions and diagrams for projecting sound great distances by means of small arms and parabolic reflectors.

Contributor:
John Herschel Project

Herschel14798

From:
Sir John Herschel
To:
Francis Beaufort
Date:
[23 March 1852]
Source of text:
Hydrographic Office Misc F26F1.1
Summary:

The theoretical considerations that JH would take into account if he were going to study the subject of 'increasing and conveying to great distances and in given directions the reports of guns or other explosive instruments, as signals.'

Contributor:
John Herschel Project

Herschel14799

From:
Sir John Herschel
To:
Francis Beaufort
Date:
[24 March 1852]
Source of text:
Hydrographic Office Misc F26F1.2a
Summary:

A note probably accompanying JH's 1852-3-23. Comments concerning someone's collection.

Contributor:
John Herschel Project
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