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126
Refrigeration
.
known
here
to
be
in as
great
request
as in
that country.
They
afford
always
a
draught
of
deliciously
cool
water,
by
being
filled
from
the
spring
and
kept
at
hand.
By
means
of
the
double
wall
and
the
self-acting
valve,
the
contents
of
the
pitcher
are
completely
shut
off
from
the
influence
of the
surrounding
atmosphere;
and
so
complete
is
the
isolation,
that
by
experiment
14-lb.
of
Wenham
Lake
ice,
put
into
3
pints
of
water
in
the
pitcher,
at
71
°
Fahrenheit,
took
seven
hours
to melt,
the
water
remaining
cold
for
many
hours
afterwards.
The
same
principle
renders
them
as
useful
for
hot
water
in
winter
as
for
iced
water
in
summer,
as
they
can
be
used
as
a
substitute
for
the
urn
in
summer
at
the
tea-table,
if
not
otherwise
requii’ed.
The
Water-Car
Caraffe
Freezer, or
Improved
Cham-
pagne
Frappd
Pail,
is
a
great
acquisition
in
a
family.
The
Patent
Freezing
Jug
consists
of
two
cylinders,
the
outer
being
a
double
case
forming
the
jug,
in
which
is
put
a
small
quantity
of cold
spring
water
;
the
inner
cylinder
is
then
inserted,
causing
the
water
to
rise
to
the
top
of
the
jug,
completely
surrounding
the
tube.
Into
this
tube,
by
means
of
a
funnel,
is
put
a
certain
quantity
of
freezing
powder,
and
cold
water
added,
till
the
tube
is
full.
By
stirring
and
agitating
the
freezing
liquid
in
the