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1
210
The Fairy-Land of Science
·
Arabella B. Buckley
82
We
have
now
seen
our
drop
of
water
under
all
its
various
forms
of
invisible
gas,
visible
steam,
cloud,
dew,
hoar-frost,
snow,
and
ice,
and
we
have
only
time
shortly
to
see
it
on
its
travels,
not
merely
up
and
down,
as
hitherto,
but
round
the
world.
We
must
first
go
to
the
sea
as
the
distillery,
or
the
place
from
which
water
is
drawn
up
invisibly,
in
its
purest
state,
into
the
air;
and
we
must
go
chiefly
to
the
seas
of
the
tropics,
because
here
the
sun
shines
most
directly
all
the
year
round,
sending
heat-waves
to
shake
the
water-particles
asunder.
It
has
been
found
by
experiment
that,
in
order
to
turn
1
lb.
of
water
into
vapour,
as
much
heat
must
be
used
as
is
required
to
melt
5
lbs.
of
iron;
and
if
you
consider
for
a
moment
how
difficult
iron
is
to
melt,
and
how
we
can
keep
an
iron
poker
in
a
hot
fire
and
yet
it
remains
solid,
this
will
help
you
to
realize
how
much
heat
the
sun
must
pour
down
in
order
to
carry
off
such
a
constant
supply
of
vapour
from
the
tropical
seas.
Now,
when
all
this
vapour
is
drawn
up
into
the
air,
we
know
that
some
of
it
will
form
into
clouds
as
it
gets
chilled
high
up
in
the
sky,
and
then
it
will
pour
down
again
in
those
tremendous
floods
of
rain
which
occur
in
the
tropics.
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