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1
378
The Story of the Atlantic Telegraph
·
Henry M. Field
270
CHAPTER
XV.
PREPARING
TO
RENEW
THE
BATTLE.
The
expedition
of
1865,
though
not
an
immediate
success,
had
the
moral
effect
of
a
victory,
as
it
confirmed
the
most
sanguine
expectations
of
all
who
embarked
in
it.
The
great
experiment
made
during
those
four
weeks
at
sea,
had
demonstrated
many
points
which
were
most
important
elements
in
the
problem
of
Ocean
Telegraphy.
These
are
summed
up
in
the
following
paper,
which
was
signed
by
persons
officially
engaged
on
board
the
Great
Eastern:
1.
It
was
proved
by
the
expedition
of
1858,
that
a
Submarine
Telegraph
Cable
could
be
laid
between
Ireland
and
Newfoundland,
and
messages
transmitted
through
the
same.
By
the
expedition
of
1865
it
has
been
fully
demonstrated:
2.
That
the
insulation
of
a
cable
improves
very
much
after
its
submersion
in
the
cold
deep
water
of
the
Atlantic,
and
that
its
conducting
power
is
considerably
increased
thereby.
3.
That
the
steamship
Great
Eastern,
from
her
size
and
constant
steadiness,
and
from
the
control
over
her
afforded
by
the
joint
use
of
paddles
and
screw,
renders
it
safe
to
lay
an
Atlantic
Cable
in
any
weather.
4.
That
in
a
depth
of
over
two
miles
four
attempts
were
made
to
grapple
the
cable.
In
three
of
them
the
cable
was
caught
by
the
grapnel,
and
in
the
other
the
grapnel
was
fouled
by
the
chain
attached
to
it.
5.
That
the
paying-out
machinery
used
on
board
the
Great
Eastern
worked
perfectly,
and
can
be
confidently
relied
on
for
laying
cables
across
the
Atlantic.
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