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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 Barrle. Lining 1 Leaf Tin 2 Waxed Linnen No thermometer would be necessary: since the quantity of Ice included would answer the purpose. Glass for the sake of seeing what ???ses - 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 puting in the subject, and the ice let the whole stand in the Ice-house (or cold Conservatory) or open ?? the whole has aquired the temperature of the 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 tween them 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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