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- 20 000 лье под водой
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"
About
6,500
;
and
as
in
reality
the
atmospheric
pressure
is
about
15
lb
.
to
the
square
inch
,
your
6,500
square
inches
bear
at
this
moment
a
pressure
of
97,500
lb
.
"
"
Without
my
perceiving
it
?
"
"
Without
your
perceiving
it
.
And
if
you
are
not
crushed
by
such
a
pressure
,
it
is
because
the
air
penetrates
the
interior
of
your
body
with
equal
pressure
.
Hence
perfect
equilibrium
between
the
interior
and
exterior
pressure
,
which
thus
neutralise
each
other
,
and
which
allows
you
to
bear
it
without
inconvenience
.
But
in
the
water
it
is
another
thing
.
"
"
Yes
,
I
understand
,
"
replied
Ned
,
becoming
more
attentive
;
"
because
the
water
surrounds
me
,
but
does
not
penetrate
.
"
"
Precisely
,
Ned
:
so
that
at
32
feet
beneath
the
surface
of
the
sea
you
would
undergo
a
pressure
of
97,500
lb
.
;
at
320
feet
,
ten
times
that
pressure
;
at
3,200
feet
,
a
hundred
times
that
pressure
;
lastly
,
at
32,000
feet
,
a
thousand
times
that
pressure
would
be
97,500,000
lb
.
--
that
is
to
say
,
that
you
would
be
flattened
as
if
you
had
been
drawn
from
the
plates
of
a
hydraulic
machine
!
"
"
The
devil
!
"
exclaimed
Ned
.
"
Very
well
,
my
worthy
harpooner
,
if
some
vertebrate
,
several
hundred
yards
long
,
and
large
in
proportion
,
can
maintain
itself
in
such
depths
--
of
those
whose
surface
is
represented
by
millions
of
square
inches
,
that
is
by
tens
of
millions
of
pounds
,
we
must
estimate
the
pressure
they
undergo
.
Consider
,
then
,
what
must
be
the
resistance
of
their
bony
structure
,
and
the
strength
of
their
organisation
to
withstand
such
pressure
!
"
"
Why
!
"
exclaimed
Ned
Land
,
"
they
must
be
made
of
iron
plates
eight
inches
thick
,
like
the
armoured
frigates
.
"
"
As
you
say
,
Ned
.
And
think
what
destruction
such
a
mass
would
cause
,
if
hurled
with
the
speed
of
an
express
train
against
the
hull
of
a
vessel
.
"
