JB/106/052/002

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Tepidarium 4 Sep. 1800

Philosop. Mag.
N<hi rend="underline">o</hi>.. 14 -

Cement for filling
up Cracks in Iron
Vessels-

Six parts of
yellow Potters
clay 1 part of
Iron filings &
Linseed Oil sufficient to
make it of it
the consistence
of Putty —

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General Idea.

A constant cause
of calefaction
whether lamp or
culinary fire,
constantly sufficient
to maintain
in the Tepidarium
(Whether
Air Chamber or
Balneum) a degree
of temperature
above the degree
required.

The function of
the Regulator
being to reduce
the temperature to
the degree required.

The heat, when
above the degree
required acting
on the Regulator
causes it to open
a Valve, which
lets out a part
of the air or water
of the Tepidarium
and lets in cold
air or water in
the room of it.

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Regulating Valve.

1. The Valve a
flat plate, lying
upon an
aperture, and
closing it by its
weight.

A tube closed at the bottom containing
a fluidopen at top containing mercury
or water with a
cylindrical cork floating on
it. A wire stuck
through the cork
in the centre of
it, rises with
cork, and pushes
up the valve:
the heat causing
the fluid in the
tube to expand,
and the expansion
causing it to rise
and raise the cork
with it

2. The Valve
a circular or a plate
semicircular plate
turning on a hinge
in the circumference
of the circle
or in the axis of the
semicircle.

The valve may
be opened by the
wire rising against
it as above, or
by a lever, the
power of which
is increased by
an influx of
mercury not towards the
extremity of the
lever

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lever, the influx
being produced by by,)
and proportioned
to, the expansion
produced by heat
as above.

The expansion
of Air being
so much greater
than that of mercury
in a given degree
of heat,
could not a
portion of air
be made to form
a part of the
expansible mass
of which the Regulator
is composed?

If for example
a very small bladder
half-filled with
air and perfectly
closed were let
down and positioned to the bottom
of the tube: the
mercury or water so if connected
resting on it. with the glass

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This supposes
the required
heat of the Tepidarium
to be
greater than the
greatest heat
of the atmosphere
in the country
(say 90.)

For lesser degrees
a Frigidarium
must be connected
with the Tepidarium

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Identifier: | JB/106/052/002"JB/" can not be assigned to a declared number type with value 106.
Date_1	1800-09-04	Marginal Summary Numbering
Box	106	Main Headings	frigidarium
Folio number	052	Info in main headings field	frigidarium
Image	002	Titles	regulating valves / compleat and ultimate end
Category	plan	Number of Pages	2
Recto/Verso	recto	Page Numbering
Penner	jeremy bentham; fr1	Watermarks	1798 am
Marginals		Paper Producer
Corrections		Paper Produced in Year	1798
Notes public		ID Number	34640
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