150 / 244
150
Essences,
8fc.
Essence of
Carrawccys.
—
Oil
of
.carraway,
J
drachm
;
proof
spirit,
2
drachms.
Cream
of
Tartar,
or
Bitartrate
of
Potash
.
During
the
fermentation
of
the
grape-juice,
or
must,
a
crystallized
stony
matter,
called
“argol,”
is
deposited
this
consists
chiefly
of
bitartrate
of
potash,
with a
little
tartrate
of
lime
and
other
matter’s,
and
is
the
source of
all
the
tartaric
acid
met
with
in
com-
merce.
The
salt
in
question
exists
in
the
juice
in
considerable
quantity
;
it
is,
however,
sparingly
soluble
in
water,
but
still
less
so
in
dilute
alcohol
hence,
as
the
fermentation
proceeds,
the
quantity
of
spirit
increases,
and
it is
then
slowly
deposited.
The
acid
of
the
fruit
is
thus
removed
as
the
sugar
disappears.
It
is
this
circumstance
that
renders
grape-juice
alone
fit
for
making
good wine
;
for,
when
that
of
gooseberries
or
currants,
&c.,
is
em-
ployed
as
a
substitute,
the
malic
and
citric
acids
which
these
fruits
contain
cannot be
withdrawn.
There
is
no
other
resource
than
to
add
sugar
in
sufficient
quantity
to
mask
and
conceal
the
natural
acidity
of
the
liquor.
Fowndes’
Chemistry.
Guava
Jelly
is
made
from
the
fruit
of
the
guava
(
Psidium
pysiferum),
which
is
a
native
of
tropical
America;
it
is
most
useful
in
flavouring
many
drinks,
especially
Punches.