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"
Why
!
how
are
you
going
to
manage
that
,
captain
?
"
asked
Pencroft
.
"
Do
you
by
chance
happen
to
think
of
establishing
a
telegraph
?
"
"
Exactly
so
,
"
answered
the
engineer
.
"
Electric
?
"
cried
Herbert
.
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"
Electric
,
"
replied
Cyrus
Harding
.
"
We
have
all
the
necessary
materials
for
making
a
battery
,
and
the
most
difficult
thing
will
be
to
stretch
the
wires
,
but
by
means
of
a
drawplate
I
think
we
shall
manage
it
.
"
"
Well
,
after
that
,
"
returned
the
sailor
,
"
I
shall
never
despair
of
seeing
ourselves
some
day
rolling
along
on
a
railway
!
"
They
then
set
to
work
,
beginning
with
the
most
difficult
thing
,
for
,
if
they
failed
in
that
,
it
would
be
useless
to
manufacture
the
battery
and
other
accessories
.
The
iron
of
Lincoln
Island
,
as
has
been
said
,
was
of
excellent
quality
,
and
consequently
very
fit
for
being
drawn
out
.
Harding
commenced
by
manufacturing
a
drawplate
,
that
is
to
say
,
a
plate
of
steel
,
pierced
with
conical
holes
of
different
sizes
,
which
would
successively
bring
the
wire
to
the
wished-for
tenacity
.
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This
piece
of
steel
,
after
having
been
tempered
,
was
fixed
in
as
firm
a
way
as
possible
in
a
solid
framework
planted
in
the
ground
,
only
a
few
feet
from
the
great
fall
,
the
motive
power
of
which
the
engineer
intended
to
utilize
.
In
fact
as
the
fulling
-
mill
was
there
,
although
not
then
in
use
,
its
beam
moved
with
extreme
power
would
serve
to
stretch
out
the
wire
by
rolling
it
round
itself
.
It
was
a
delicate
operation
,
and
required
much
care
.
The
iron
,
prepared
previously
in
long
thin
rods
,
the
ends
of
which
were
sharpened
with
the
file
,
having
been
introduced
into
the
largest
hole
of
the
drawplate
,
was
drawn
out
by
the
beam
which
wound
it
round
itself
,
to
a
length
of
twenty-five
or
thirty
feet
,
then
unrolled
,
and
the
same
operation
was
performed
successively
through
the
holes
of
a
less
size
.
Finally
,
the
engineer
obtained
wires
from
forty
to
fifty
feet
long
,
which
could
be
easily
fastened
together
and
stretched
over
the
distance
of
five
miles
,
which
separated
the
corral
from
the
bounds
of
Granite
House
.
It
did
not
take
more
than
a
few
days
to
perform
this
work
,
and
indeed
as
soon
as
the
machine
had
been
commenced
,
Cyrus
Harding
left
his
companions
to
follow
the
trade
of
wiredrawers
,
and
occupied
himself
with
manufacturing
his
battery
.
It
was
necessary
to
obtain
a
battery
with
a
constant
current
.
It
is
known
that
the
elements
of
modern
batteries
are
generally
composed
of
retort
coal
,
zinc
,
and
copper
.