JB/106/009/002

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Flash Pump

26

The stage is
unnecessary. The
Match may be
lowerd to the proper
position by
the ballance, &
Fire put to the
match before it
is let down

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27

Fewel-dry

The driness of the
fewel is of the
greatest importance
on account of its
influence on the
quickness of the
stroke.

Suppose the expence
of fuel for
a stroke is 1/20
of the profit, and
the expence of fuel
of an ordinary
degree of driness
twice that of the
same fuel in a
state of perfect
driness: the driest
fewel would be
in effect 20 times
as cheap as the
other

27

Refrigeration

Is it not to be
apprehended that
the air chamber
would acquire heat faster
than it would lose
it, so that the
air after each stroke
being hotter than before
would be more
rare and consequently
the water less
low and the rise of
water at a strokeless great?
If so, the remedy
would be to detach
the copper lining from the
brick work all round,
in short to have a
false lining, and
a stream of water constantly

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28

Blast husbanded

To take advantage
of the blast of wind
issuing driven out by
the flash, make
it turn a windmill
which might be
vertical or horizontal.

As the whole current
of the air
might be confined
to the dimension
of the sail instead
of being diffused
extending through
the whole space of
the atmosphere
as in a common
windmill, might
not the vanes be
made so as to
present always
their greatest surface
to the blast, and
their edge afar thing
had got out of the
reach of it?

Would the making
use of the wind
in this way retard
the blast considerably
so as to do
more mischief by
such retardation than
the benefit would be
worth?

N.B. The advantage
of such a windmill near
the common one is
only the saving the time
that would be otherwise
lost by calms.

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constantly
arising between that
and the true one.

N.B. a very thin
sheet of water would
be sufficient.

As
be

As in the air chamber
there will be
some one point
at which it
will be more advantageous
to
have the focus
of heat than in
any other, say
the central point,
and as the magnitude
i:e:
the height of the
air chamber will
change with the
height of the water
in it, it will be
would be of advantage
if the
focus could be
made moveable,
so that its place
should be regulated
by the
height of the water
previous to the
flash.

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29

The water in
the air chamber tower
will sink only
in proportion as
the air is let in
and the air will
be let in only
in proportion as
the water is let
out, bulk for
bulk —

Therefore the fall
may be made to
begin at any
height within the
33, and the rising
and falling and
be only between
the line of that greatest
height and the
line of the lowest
height, wherever
it was thought proper
this latter should
be situated

Thence there need
be no bottom to
or floor to the tower:
it should stand
upon arches, the
crowns of the arches
being not lower
than the lowest
height of the
pond.

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30

Closing - when

How to know when
the flask has produced
its full effect?
For hanging flaps of a valve or
flap hanging shutting by
its own weight be
employ'd as an index
of the degree of
rarefaction it may
be kept open a
considerable time:
as it may be a
considerable time
before the air begins
to cool of stre
itself

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Identifier: | JB/106/009/002 "JB/" can not be assigned to a declared number type with value 106.
Date_1		Marginal Summary Numbering	26-30
Box	106	Main Headings
Folio number	009	Info in main headings field	flash-pump
Image	002	Titles
Category	marginal summary 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	includes drawings	ID Number	34597
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