100 / 230
100
THE
COMPLETE
PRACTICAL
DISTILLER.
this
twice
more,
drawing
off
two-thirds
each
time
;
to
add
water
to
this
alcohol,
which
will
turn
'it
milky,
by
separat-
ing
the
essential
oil
remaining
in
it;
to
distil
the
spirit
from
this
water,
and
finally
rectify
it
by
one
or
more
dis-
tillations.
Others
set
apart the
first
running,
when
about
one-fourth
is
come
over,
and
continue
the
distillation
till
they
have
drawn
off
about
as
much
more,
or
till
the
liquor
runs
off
milky.
The
last
running
they
put
into
the
still
again,
and
mix
the
first
half
of
what
comes
over
with
the
preceding
first
product.
This
process
they
repeat
again,
when
all
the
first
products
mixed
together
are
distilled
afresh.
When
half
of
the
liquor
has
come
over,
this
is
to
be
set
apart
as
pure
alcohol.
Alcohol
in
this
state,
notwithstanding,
is
not
so
pure
as
when
it
has
been
dephlegmed,
or
still
fur-
ther
freed
from
water,
by
means
of
some
alkaline
salt.
Muriate
of
soda
has
been
recommended
for
this
purpose,
deprived
of
its
water
of
crystallization
by
heat,
and
added
hot
to
the
spirit
;
but
the
subcarbonate
of
potash
is
pre-
ferable.
About
a
third
of
the
weight
of
the
alcohol
should
be
added
to
it
in
a
glass
vessel,
well
shaken
and
then
suf-
fered
to
subside.
The
salt
will
be
moistened
by
the
water
absorbed
from
the
alcohol,
which
being
decanted,
more
of
the
salt
is
to
be
added;
and
this
is
to
be
continued
till
the
salt
falls
dry
to
the
bottom
of
the
vessel.
The
alco-
hol, in
this
state,
will
be
reddened
by
a
portion
of
pure
potash
which
it
will
hold
in
solution,
from
which
it
must
be
freed
by
distillation
in
a
water-bath.
Dry
muriate
of
lime
may
be
substituted
advantageously
for
the
alkali.
Lastly,
as
alcohol
is
much
lighter
than
water,
its
specific