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210
The Fairy-Land of Science
·
Arabella B. Buckley
72
There
are
other
ways
in
which
the
air
may
be
chilled,
and
rain
made
to
fall,
as,
for
example,
when
a
wind
laden
with
moisture
strikes
against
the
cold
tops
of
mountains.
Thus
the
Khasia
Hills
in
India
which
face
the
Bay
of
Bengal,
chill
the
air
which
crosses
them
on
its
way
from
the
Indian
Ocean.
The
wet
winds
are
driven
up
the
sides
of
the
hills,
the
air
expands,
and
the
vapour
is
chilled,
and
forming
into
drops,
falls
in
torrents
of
rain.
Sir
J.
Hooker
tells
us
that
as
much
as
500
inches
of
rain
fell
in
these
hills
in
nine
months.
That
is
to
say,
if
you
could
measure
off
all
the
ground
over
which
the
rain
fell,
and
spread
the
whole
nine
months'
rain
over
it,
it
would
make
a
lake
500
inches,
or
more
than
40
feet
deep!
You
will
not
be
surprised
that
the
country
on
the
other
side
of
these
hills
gets
hardly
any
rain,
for
all
the
water
has
been
taken
out
of
the
air
before
it
comes
there.
Again
for
example
in
England,
the
wind
comes
to
Cumberland
and
Westmorland
over
the
Atlantic,
full
of
vapour,
and
as
it
strikes
against
the
Pennine
Hills
it
shakes
off
its
watery
load;
so
that
the
lake
district
is
the
most
rainy
in
England,
with
the
exception
perhaps
of
Wales,
where
the
high
mountains
have
the
same
effect.
In
this
way,
from
different
causes,
the
water
of
which
the
sun
has
robbed
our
rivers
and
seas,
comes
back
to
us,
after
it
has
travelled
to
various
parts
of
the
world,
floating
on
the
bosom
of
the
air.
But
it
does
not
always
fall
straight
back
into
the
rivers
and
seas
again,
a
large
part
of
it
falls
on
the
land,
and
has
to
trickle
down
slopes
and
into
the
earth,
in
order
to
get
back
to
its
natural
home,
and
it
is
often
caught
on
its
way
before
it
can
reach
the
great
waters.
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