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164
THE
COMPLETE
PRACTICAL
DISTILLER.
because
the
predominant
taste
of
the
aniseeds
will
entirely
cover
what
they
had
before
acquired
from
other
ingre-
dients.
Such
are
the
points
to
be
taken
notice
of
on
this
subject.
RULES
FOE
DETERMINING
THE
RELATIVE
VALUE
AND
STRENGTH
OF
SPIRITS.
The
following
requisites
are
necessary
to
be
obtained
before
this
can
be
done
in
a
satisfactory
manner:
—
The
specific
gravities
of
a
certain
number
of
mixtures
of
alco-
hol
and
water
must
be
taken
so
near
each
other
as
that
the
intermediate
specific
gravities
may
perceptibly
diflfer
from
those
deduced
from
the
supposition
of a
mere
mix-
ture
of
the
fluids
;
the
expansions
or
variations
of
specific
gravity
in
these
mixtures
must
be
determined
at
different
temperatures;
some
easy
method
must
be
contrived
for
determining
the
presence
and
quantity
of
saccharine
or
oleaginous
matter
which
the
spirits
may
hold
in
solution,
and
the
effect
of
such
solution
on
the
specific
gravity
and,
lastly,
the
specific
gravity
of
the
fluid
must
be
ascer-
tained
by
a
proper
floating
instrument,
with
a
graduated
stem
or
set
of
weights,
or,
which
may
be
more
convenient,
with
both.
They
will
be
well
suited
for
answering
the
purpose
of
the
operator.