JB/107/090/001

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Heat of quite
red-hot iron
expands a quantity
of air into a space
which is barely 4
times the space it
occupies naturally
in a temperate
degree of heat. p.
29

Air not rarefied
more than 1/3 by
a heat which however
never scorched
the machine.p.128.
1/2 from the small
machine. p.302.
The fire place was
here a copper bru
1/2 foot Barometer

N.B. Here the fire
was made not within
the machine, but
under it and therefore
to a disadvantage
in respect of
acquisition of heat -

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One degree of
heat of Fahrenheit
serves to
expand the air
about 1/500 part.
p. 30

About 500 degrees of heat
will just double
the bulk of a quantity
of air

A cubic foot of
air weighs about
1 1/5 ounce or
87 grams
averdupoise.

Height of the Barometer
varies fro
between inches 28' &
31
p.214.

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In a mean temperature
and gravity
of the atmosphere,
near the surface
of the earth
the weight of air
compared to the
weight of water is
as 1 to 840:
so that a cubic
inch of air in
that state weighs
about 301/1000 parts
of a grain. p.30

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1
Montgolfiers machine
in parallfied in of 40 cubic
feet raised by
burning paper
applied to its aperture.
p.43

2
2 Experimt 650
cubic feet- fewel
not mentioned. p. 44

3
23,430 Fe.Cub.
Weight 500
additional 490
Fewel straw
and chopped wool
under the aperture
Ascended to
Feet
height 6,000
p.47

Top a pyramid To
Middle part {Dim 43
a prism { Height

Top pyramidal{height 29

Bottom
part {height 20
conical {
truncated {

Materials canvas
papered within &
without - weight£6 1000

Additional & 400 &
weight between 500

Fewel 50lb weight of
dry straw in bundles
in which 12
pounds of chopped
wool was thrown
at intervals - This
swelled it but the
cords were not cut
It iswas evident that if
the cord had been cut
the machines would
have ided in a

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Machine
Height 131
Diameter 104
Quantity of fewel burnt
not mentioned
Its weight over>
when it went up 1600
& it went up 1000 Yard
time It was
then in very bad
condition yet ascended
at least 1000 yards:
p.19. N.B. at
which height the ty
air without must have been
much lighter than
below consequently
more air so in st expelled to
it to that height

In this same machine
on putting bundle
of straw on which
spirit of wine had been
sprinkled on the fire
the hidden flame increased
such a rarifaction
that the machine
notwithstanding the
efforts of 50 persons
who were employ'd to
hold it, rose three feet
from the ground, &
went to the distance of
15 feet. " p. 107.

+ 62 lb of this fewel therefore
drove drove out 1500 lb weight of air and how
much more is not
known. .consequently
it would ad give ad-
to

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Identifier: | JB/107/090/001 "JB/" can not be assigned to a declared number type with value 107.
Date_1		Marginal Summary Numbering
Box	107	Main Headings
Folio number	090	Info in main headings field	flash data from carvalho
Image	001	Titles
Category	rudiments sheet (brouillon)	Number of Pages	2
Recto/Verso	recto	Page Numbering
Penner	jeremy bentham	Watermarks	[[watermarks::l munn [partial britannia with shield emblem]]]
Marginals		Paper Producer	benjamin constant
Corrections		Paper Produced in Year
Notes public		ID Number	35081
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