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378
The Story of the Atlantic Telegraph
·
Henry M. Field
271
6.
That
with
the
improved
telegraphic
instruments
for
long
submarine
lines,
a
speed
of
more
than
eight
words
per
minute
can
be
obtained
through
such
a
cable
as
the
present
Atlantic
between
Ireland
and
Newfoundland,
as
the
amount
of
slack
actually
paid
out
did
not
exceed
fourteen
per
cent,
which
would
have
made
the
total
cable
laid
between
Valentia
and
Heart's
Content
nineteen
hundred
miles.
7.
That
the
present
Atlantic
Cable,
though
capable
of
bearing
a
strain
of
seven
tons,
did
not
experience
more
than
fourteen
hundred-weight
in
being
paid
out
into
the
deepest
water
of
the
Atlantic
between
Ireland
and
Newfoundland.
8.
That
there
is
no
difficulty
in
mooring
buoys
in
the
deep
water
of
the
Atlantic
between
Ireland
and
Newfoundland,
and
that
two
buoys
even
when
moored
by
a
piece
of
the
Atlantic
Cable
itself,
which
had
been
previously
lifted
from
the
bottom,
have
ridden
out
a
gale.
9.
That
more
than
four
nautical
miles
of
the
Atlantic
Cable
have
been
recovered
from
a
depth
of
over
two
miles,
and
that
the
insulation
of
the
gutta-percha-covered
wire
was
in
no
way
whatever
impaired
by
the
depth
of
water
or
the
strains
to
which
it
had
been
subjected
by
lifting
and
passing
through
the
hauling-in
apparatus.
10.
That
the
cable
of
1865,
owing
to
the
improvements
introduced
into
the
manufacture
of
the
gutta-percha
core,
was
more
than
one
hundred
times
better
insulated
than
cables
made
in
1858,
then
considered
perfect
and
still
working.
11.
That
the
electrical
testing
can
be
conducted
with
such
unerring
accuracy
as
to
enable
the
electricians
to
discover
the
existence
of
a
fault
immediately
after
its
production
or
development,
and
very
quickly
to
ascertain
its
position
in
the
cable.
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