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Flash Pump
26
The stage is
unnecessary. The
Match may be
toward to the proper
position by
the ballance, &
Fire put to the
match before it
is lit 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 expense of fewel of an ordinary degree of driness twice that of the same fuel in a state of purified 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 require fewel faster than it would lose it, so that the air after each stroke being further than before would be more rare and consequently by the water less at a stroke great? If so, the remedy would be to detach the copper lining from the brick work all round , in that to have a false lining, and a stream of waterconstantly
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28
Blast husbanded
To take advantage
of the blast of wind
riing 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 ?vane? be
made so as to
present always
their greatest surface
to the blast, and
their edge afarthing
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 woulld be
worth?
N.B. the advantage
of such a windmill
the common one is
only the saving the time
that would be otherwise
lost by calms.
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constantly more
rising 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 present
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 unviable,
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 thin and 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 flap 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 st? itself
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Identifier: | JB/106/009/002"JB/" can not be assigned to a declared number type with value 106. |
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26-30 |
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106 |
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009 |
flash-pump |
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002 |
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marginal summary sheet |
2 |
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|
recto |
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jeremy bentham |
[[watermarks::l munn [britannia emblem]]] |
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benjamin constant |
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includes drawings |
34597 |
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