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1036
Enquire within upon everything
·
Robert Kemp Philp
731
[FAIR
AND
SOFTLY
GO
SURE
AND
FAR.]
2143.
Further
Directions.
Actual
quanties--one
pound
of
chloride
of
ammonium,
or
sal
ammoniac,
finely
powdered,
is
to
be
intimately
mixed
with
two
pounds
of
nitrate
of
potasium
or
saltpetre,
also
in
powder;
this
mixture
we
may
call
No.
1.
No.
2
is
formed
by
crushing
three
pounds
of
the
best
Scotch
soda.
In
use,
an
equal
bulk
of
both
No.
1
and
No.
2
is
to
be
taken,
stirred
together,
placed
in
the
ice-pail,
surrounding
the
ice-pot,
and
rather
less
cold
water
poured
on
than
will
dissolve
the
whole;
if
one
quart
of
No.
1,
and
the
same
bulk
of
No.
2
are
taken,
it
will
require
about
one
quart
of
water
to
dissolve
them,
and
the
temperature
will
fall,
if
the
materials
used
are
cool,
to
nearly
thirty
degrees
below
freezing.
Those
who
fail,
may
trace
their
want
of
success
to
one
or
other
of
the
following
points:--the
use
of
too
small
a
quantity
of
the
preparation,--the
employment
of
a
few
ounces;
whereas,
in
freezing
ices,
the
ice-pot
must
be
entirely
surrounded
with
the
freezing
material:
no
one
would
attempt
to
freeze
with
four
ounces
of
ice
and
salt.
Again,
too
large
a
quantity
of
water
may
be
used
to
dissolve
the
preparation,
when
all
the
excess
of
water
has
to
be
cooled
down
instead
of
the
substance
it
is
wished
to
freeze.
All
the
materials
used
should
be
pure,
and
as
cool
as
can
be
obtained.
The
ice-pail
in
which
the
mixture
is
made
must
be
of
some
non-conducting
material,
as
wood--which
will
prevent
the
access
of
warmth
from
the
air;
and
the
ice-pot,
in
which
the
liquor
to
be
frozen
is
placed,
should
be
of
pewter,
and
surrounded
nearly
to
its
top
by
the
freezing
mixture.
Bear
in
mind
that
the
making
of
ice-cream,
under
any
circumstances,
is
an
operation
requiring
considerable
dexterity
and
practice.
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