JB/106/004/002

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Conversation Tubes 1793 To Nepean

As Messrs Wyats Pinand
Tube Manufactory
Sept 24. 1793.
Such Tube composed of}
3/4 108} Present
} J.Bentham
1 222} S. Bentham
1 1/4 36} John Wyat
_____
Total 336 - 3 right
angles besides another
great bend.

1/2 was totally inaudible
be a distance
if not more than
80 feet

A bell close any to an
end to as close as
it would be without
touching was not
heard at all.

It was of the size
of a common House
bell such as are
hung to windows.

A very gently tap
with a pearl case
was heard perfectly

Even a whisper
was heard

A very low voice
such as would not
have been heard
length of an ordinary
room was heard
perfectly

It required the mouth
to be buried as it
were in the tube.
A small ath
conveyed the 330
sound as well as in
a large Frenchhorn
piece. But the French
horn piece was most
commodious as it was
easier to shift from
speaking to hearing &
vice versa.

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Expense of the
tubes pipes over and
above that of digging
the ground
laying the tubes
and covering the
ground in again

A1} 3d Yards
} 4d
}6d

Yards Yards his foot<add>At his</add>Expence

| | | £ s d
660 | 220 |3d|8-5-0
| |4d|11-0-0
| |6 |16-10-0
| | |
|440|3|16-10-0
| |4|22-0-0
| |6|33-0-0
|880|3|33
| |4|44
| |6|66-0-0
|1760|63|66-0-0
| |4|88-0-0
| |6|132 3|
4|
6|

Mile 1665
1/2 Mile 832 10
1/4 Mile 41-105
1/8 Mile 20-1526
1/16 Mile 10-7603

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From Queen's House
to St James's
From Queens House
to House of Commons
— to House of Lords
— to Horse Guards
— to the Tower

From Newgate
to Secr.y of State's
Office Whitehall

From the Official
Apartment of every
Cabinet Minister
to that of every other
From So from House
to House if their
houses were contiguous
or near
Ex. gr. Treasury,
Admiralty.

From the Admiralty
to the several
Dockyards

From Panopticon
Inspection to the Porters
Lodges to the two
Guardhouses

— to the Watch
house on the River
— to the Chelsea Hospital
to the
War Office.

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From the Horse
-Guards to the
Mnnsion-House
From the to the
Tower

From the Mansion
-House to the Tower.

From the Treasury
Secr.y of State's Office
&c to the Post-
-Office

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Mask for the
face

Tube for the
mouth Mouthpiece
oval-with sidesmall pipes for
the ears like
Calipers

Tube to branch
off to right &
left-would
the speaker be
heard by both?

The Calipers
to be made to
fit adjustible different
heads by a
flexible point
like lobster's
body.

A Closet to
speak in with
a Sounding board
near the mouth
of the tube

For Domestic purposes
to prevent
reciprocity inclose
the masters end
in a little cupboard
which may
be kept locked

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Identifier: | JB/106/004/002 "JB/" can not be assigned to a declared number type with value 106.
Date_1	1793-09-24	Marginal Summary Numbering
Box	106	Main Headings
Folio number	004	Info in main headings field	conversation tubes to nepean, 1793
Image	002	Titles
Category	text sheet	Number of Pages	2
Recto/Verso	recto	Page Numbering
Penner	jeremy bentham	Watermarks	[[watermarks::l munn [britannia emblem]]]
Marginals		Paper Producer	benjamin constant
Corrections		Paper Produced in Year
Notes public		ID Number	34592
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