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24 Sept 1796
Preservation by Temperature Cold Conservatory
In contriving the
preparatory experiments
keep an
eye to the practice
in the great, so as
not to aim at
greater degrees of
nicety than can
be made sure of
in common practice
- unless for
the sake of settling
principles.
When water (hot
or cold) is let into
the Balneum in
order to regulate
the temperature
by making up
for any unite
unintended change
produced in it
it should be let
in in driops rather
than in a mass
ex.g. by spouting
thro' a rose over
the cock or by
droppong thro'
a cullender &c
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Ship Conservatory
By means of the
Double-Vessels bounded
bad-conducting
Vessels Ice might
probably be carried
to the E. Indies
and back again
without melting
more than required
beyond the power
of keeping the included
Balneum
at the non-fermenting
temperature.
The great demand
for cold would be
to reduce the goods
themselves in the first
instance to within
the non-fermenting
temperature.
The possibility is
means of managing
the Ship Conservatory
might
be previously
established by experiments
on land.
Keeping the Vessels
inclosing the Ice in
a Hot-House.
Bad Conductors
or
Temperature Fences
1. Bees Wax since
heat would not penetrate
it without havingmelted
it.
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Nests of Cases or
for Cupt Temperature -
preserving experiments.
Concentric
Diameters varying
in the same ratio
say 1/2 an inch
Filling for the space
between cup & cup
1. Air
2 Cotton loosely
packed -
3. Cotton closely
packed- viz: as
much again in
the same space
4. Wood
5. Bees Wax.
Glass Receivers
best, as showing
the state of the subject,
and the progress
of the melting of the
Ice
Three Receivers
one within another.
The inner one No
1, that next to it No
2, & so on.
Between No 1 &
No 2, pounded Ice
Between No 2 &
No3 nothing but
air.
The covers, and
supports for the bottoms
of 2 1, & 2
so ordered that there
may be the same distance
between them
in every part.
The Covers of
baked wood varnished
with circular channels or grooves and
with flannel, corresponding
to the rims
of the Receivers, so that
the rims, for about 1/2
an inch may fit into them.
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1 Barrels
2. Turkish Drums
3. Welsh Oyster Barrels.
Lining
1 Leaf Tin
2 Waxed Linnen.
—
No thermometer would
be necessary: since the
quantity of Ice melted
would answer the
purpose.
Glass for the sake
of seeing what passes -
the quantity
of Ice melted - and
the changes in the Subject.
But for portability,
the whole should be
inclosed in a wooden
frame - formed by
4 perpendicular
supports joining a
top & and bottom.
To try the experiment -
After putting in the
subject, and the Ice
let the whole stand
in the Ice-house
(or cold Conservatory) or open
the whole has acquired
the temperature of that receptacle.
Then, having
observed the temperature by
a thermometer and
closed in the cover,
remove the Machine
into a Hot-House
Machine II
5 such glasses at
the same distances,
with Ice between 3
& 4, as well as between
1 & 2.
Machine III
3 Glasses only - but
the distances twice
as great so that
the diameter of No
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Identifier: | JB/106/039/002"JB/" can not be assigned to a declared number type with value 106. |
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1798-09-24 |
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106 |
frigidarium |
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039 |
preservation by temperature cold conservation no 5 tepidarium |
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002 |
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plan |
2 |
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recto |
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jeremy bentham |
i taylor |
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evan nepean |
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includes a pinned-on column |
34627 |
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