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- Жюль Верн
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- Стр. 121/526
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Under
the
engineer
's
directions
,
Pencroft
,
armed
with
a
pickaxe
,
which
he
handled
skillfully
and
vigorously
,
attacked
the
granite
.
The
hole
was
made
on
the
point
of
the
shore
,
slanting
,
so
that
it
should
meet
a
much
lower
level
than
that
of
the
water
of
the
lake
.
In
this
way
the
explosive
force
,
by
scattering
the
rock
,
would
open
a
large
place
for
the
water
to
rush
out
.
The
work
took
some
time
,
for
the
engineer
,
wishing
to
produce
a
great
effect
,
intended
to
devote
not
less
than
seven
quarts
of
nitro-glycerine
to
the
operation
.
But
Pencroft
,
relieved
by
Neb
,
did
so
well
,
that
towards
four
o'clock
in
the
evening
,
the
mine
was
finished
.
Now
the
question
of
setting
fire
to
the
explosive
substance
was
raised
.
Generally
,
nitro-glycerine
is
ignited
by
caps
of
fulminate
,
which
in
bursting
cause
the
explosion
.
A
shock
is
therefore
needed
to
produce
the
explosion
,
for
,
simply
lighted
,
this
substance
would
burn
without
exploding
.
Cyrus
Harding
could
certainly
have
fabricated
a
percussion
cap
.
In
default
of
fulminate
,
he
could
easily
obtain
a
substance
similar
to
guncotton
,
since
he
had
azotic
acid
at
his
disposal
.
This
substance
,
pressed
in
a
cartridge
,
and
introduced
among
the
nitro-glycerine
,
would
burst
by
means
of
a
fuse
,
and
cause
the
explosion
.
But
Cyrus
Harding
knew
that
nitro-glycerine
would
explode
by
a
shock
.
He
resolved
to
employ
this
means
,
and
try
another
way
,
if
this
did
not
succeed
.
In
fact
,
the
blow
of
a
hammer
on
a
few
drops
of
nitro-glycerine
,
spread
out
on
a
hard
surface
,
was
enough
to
create
an
explosion
.
But
the
operator
could
not
be
there
to
give
the
blow
,
without
becoming
a
victim
to
the
operation
.
Harding
,
therefore
,
thought
of
suspending
a
mass
of
iron
,
weighing
several
pounds
,
by
means
of
a
fiber
,
to
an
upright
just
above
the
mine
.
Another
long
fiber
,
previously
impregnated
with
sulphur
,
was
attached
to
the
middle
of
the
first
,
by
one
end
,
while
the
other
lay
on
the
ground
several
feet
distant
from
the
mine
.
The
second
fiber
being
set
on
fire
,
it
would
burn
till
it
reached
the
first
.
This
catching
fire
in
its
turn
,
would
break
,
and
the
mass
of
iron
would
fall
on
the
nitro-glycerine
.
This
apparatus
being
then
arranged
,
the
engineer
,
after
having
sent
his
companions
to
a
distance
,
filled
the
hole
,
so
that
the
nitro-glycerine
was
on
a
level
with
the
opening
;
then
he
threw
a
few
drops
of
it
on
the
surface
of
the
rock
,
above
which
the
mass
of
iron
was
already
suspended
.
This
done
,
Harding
lit
the
end
of
the
sulphured
fiber
,
and
leaving
the
place
,
he
returned
with
his
companions
to
the
Chimneys
.
The
fiber
was
intended
to
burn
five
and
twenty
minutes
,
and
,
in
fact
,
five
and
twenty
minutes
afterwards
a
most
tremendous
explosion
was
heard
.
The
island
appeared
to
tremble
to
its
very
foundation
.
Stones
were
projected
in
the
air
as
if
by
the
eruption
of
a
volcano
The
shock
produced
by
the
displacing
of
the
air
was
such
,
that
the
rocks
of
the
Chimneys
shook
.
The
settlers
,
although
they
were
more
than
two
miles
from
the
mine
,
were
thrown
on
the
ground
.
They
rose
,
climbed
the
plateau
,
and
ran
towards
the
place
where
the
bank
of
the
lake
must
have
been
shattered
by
the
explosion
.
