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PREVENTION
OF
INEQUALITY
OF
HEAT.
59
If
any
portion
of
the
alcohol
should
pass
up
the
worm-
pipe,
it
will
become
condensed
in
its
progress,
and
by
the
position
of
the
worm
will
be
enabled
to
run
back
again,
and
pass
into
the
vat.
A
small
cock
h
is
placed
at
thft
bottom
of
the
cone,
for
trying
the
strength
of
the
con-
densed
alcohol.
This
apparatus
may
be
removed
froiA
its
present
situation
to
another
fermenting
vat
by
draw-
ing
off
the
water
and
disengaging
the
head
h
from
itj
place.
The
plate
is
furnished
with
circular
wedges
round
the
circumference,
as
seen
at
t,
i,
made
to
act
beneath
hooks
)
the
apparatus,
being
turned
round
by
the
handler
in
a
horizontal
direction,
becomes
fixed in
its
place,
hav-
ing
between
the
plate
and
the
head
a
ring
of
thick
leather,
to
prevent
the
gas
from
escaping.
The
sole
object
and
novelty
proposed
in
this
improvement
is
to
prevent
the
loss
of
alcohol
in
the
usual
process
of
fermenting
liquors
in
open
vats,
and
to
return the
condensed
alcohol
into
the
liquor
again.
INSTRUMENT
TO
PREVENT
INEQUALITY
OF
HEAT
IN
DISTILLATION.
Distillation
consists
principally
of
two
operations,
viz.
the
conversion
of
the
matter
into
vapours
by
heat,
and
the
condensation
of
the
same
vapours
by
its
opposite.
Therefore,
that
this
twofold
operation
should
be
effected
with
promptitude,
and
at
the
least
expense
for
combus-
tibles,
it
is
necessary
that
a
perfect
equilibrium
should
be
established
between
the
heat
in
evaporation
and
the con-
densing
cold
in
resisting
the
latter,
by
means
of
a
giveu