23 / 230
DISTILLATION.
23
Operator
wishes
to
have
the
alcohol
more
or
less
pure.
In
order
that
the
alcohol
should
not
evaporate
in
passing
from
the
worm
into
the
hogshead,
&c.,
and
that
the
stream
of
the
liquor
may
be
seen
at
the
same
time,
a
pipe
is
attached
to
the
extremity
of
the
worm,
communicating
with
the
bunghole
of
the
hogshead.
The
terminating
part
of
this
pipe
is
formed
of
glass,
through
which
the
liquid
may
be
distinctly
seen.
This
instrument
is
called
the
lantern.
The
alcoholic
vapour
that
passes
into
the
first
egg
in
a
state
of
ebullition,
and
deposits
a part
of
its
caloric
there,
contributes
to
the
ebullition
of
the
wine
in
this
vessel,
and
disposes
the
liquor
to distillation
;
still
the
wine
is
not
carried
to
that
degree
of
heat
necessary
for
this
operation
till
a
consider-
able
time
after
the
distillation
has
commenced
from
the
still.
It
is
then
less
pure
than
when
it
was
first
put
in
it is
charged
with
watery
vapours
that
have
not
been
able
to
combine
with
it.
Two
different
products
are
then
brought
up
to
the
su-
perior
part
of
the
first
egg
;
that
is
to
say,
the
brandy
that
came
out
of
the
still,
but disengaged
from
its
watery
parts,
and
the
brandy
produced
from
the
liquor
of
the
first
egg.
This
being
charged
with
more
water
than
the
first,
weakens
the
first
liquor;
and
nothing
is
obtained
from
this
mixture
beyond
a
brandy
of
14°
or
16°.
In
the
passage
of
the
liquor
into
the
second
egg,
the
same
phenomenon
takes
place
;
but
here
the
aqueous
vapours
mingle
with
the
wine,
and
the
alcoholic
vapours
rise
from
the
second
egg
with
a
less
quantity
of
water
than
those
of
the
first,
and
the
brandy
flows
at
18°.
When
it
is
the