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1
1036
Enquire within upon everything
·
Robert Kemp Philp
734
[ALL
IS
NOT
GOLD
THAT
GLITTERS.]
2153.
Sal
Ammoniac
as
a
Freezing
Mixture.
If
the
ordinary
sal
ammoniac
of
the
shops
is
used,
it
will
be
found
both
difficult
to
powder,
and
expensive;
in
fact,
it
is
so
exceedingly
tough,
that
the
only
way
in
which
it
can
be
easily
divided,
except
in
a
drug
mill,
is
by
putting
as
large
a
quantity
of
the
salt
into
water
which
is
actually
boiling
as
the
latter
will
dissolve;
as
the
solution
cools,
the
salt
crystalizes
out
in
the
solid
form,
and
if
stirred
as
it
cools,
it
separates
in
a
state
of
fine
division.
As
this
process
is
troublesome,
and
as
the
sal
ammoniac
is
expensive,
it
is
better
to
use
the
crude
muriate
of
ammonium,
which
is
the
same
substance
as
sal
ammoniac,
but
before
it
has
been
purified
by
sublimation.
This
is
not
usually
kept
by
druggists,
but
may
be
readily
obtained
of
any
of
the
artificial
manure
merchants,
at
a
very
moderate
rate;
and
its
purity
may
be
readily
tested
by
placing
a
portion
of
it
on
a
red-hot
iron,
when
it
should
fly
off
in
a
vapour,
leaving
scarcely
any
residue.
2154.
Coldness
of
the
Materials
used.
It
is
hardly
necessary
to
add,
that
in
icing
wines,
or
freezing,
the
effect
is
great
in
proportion
to
the
coldness
of
the
materials
used;
therefore,
every
article
employed,
viz.,
the
water,
tubs,
mixtures,
&c.,
should
be
as
cool
as
possible.
2155.
Blackbirds.
The
cock
bird
is
of
a
deep
black,
with
a
yellow
bill.
The
female
is
dark
brown.
It
is
difficult
to
distinguish
male
from
female
birds
when
young;
but
the
darkest
generally
are
males.
Their
food
consists
of
German
paste,
bread,
meat,
and
bits
of
apple.
The
same
treatment
as
given
for
the
thrush
(See
par.
2456)
applies
to
the
blackbird.
Marker
Marker
Fine marker
White-out
Fine white-out
Circle
Paint
Unmarker
Hand
Scalpel
Dice
Sieve
Purify
Undo
Redo
Start over
