The
jet
of
air
is
regulated
by
a
small
cock,
and
the
most
surprising
thing
is
the
small
supply
of
air
which
is
found
requisible
to
producethis
large
and
vivd
light,
and
to
consume
the
smoke
so
perfectly
that
there
is
no
smell
from
it.
We
subjoin
a
little
sketch,
sufficient
to
give
a
general
idea
of
the
thing
;
but
the
lamp
can
be
so
easily
seen
at
the
factory
of
Mr.
Beale,
that
we
do
not
think
it
necessary
to
explain
the
move
of
suspending
or
regulating
the
supply
of
tar,
or
the
relative
size
of
the
different
parts.
The
flame
rises
about
6
inches
above
the
top
of
the
inverted
cup,
and
is
more
brilliant
than
a
gas
light.
We
conceive
that
it
will
be
very
beneficial
to
the
poor,
for
such
a
flame
would
be
quite
sufficient
to
boil
a
saucepan
or
tea-kettle,
and
for
2/3
:
of
the
year
would
render
fire
innecessary
in
a
cottage.
[...]
is
calculated
that
one
horse
power
applied
to
an
air-pump
or
bellows,
would
produce
sufficient
blast
of
air
for
the
supply
of
two
or
three
thousand
lights
;
but
in
detached
cottages,
a
small bellows
worked
by
the
foot,
or
by
a
child,
would
supply
the
air
necessary.
A
quart
of
coal-tar
[Voir
le
dessin
sur
l'original]
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