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281
Heroes of the Telegraph
·
John Munro
273
In
1848,
when
the
war
broke
out
with
Denmark,
he
was
sent
to
Kiel
where,
together
with
his
brother-in-law,
Professor
C.
Himly,
he
laid
the
first
submarine
mines,
fired
by
electricity
and
thus
protected
the
town
of
Kiel
from
the
advance
of
the
enemies'
fleet.
Of
late
years
the
German
Government
has
laid
a
great
network
of
underground
lines
between
the
various
towns
and
fortresses
of
the
empire;
preferring
them
to
overhead
lines
as
being
less
liable
to
interruption
from
mischief,
accident,
hostile
soldiers,
or
stress
of
weather.
The
first
of
such
lines
was,
however,
laid
as
long
ago
as
1848,
by
Werner
Siemens,
who,
in
the
autumn
of
that
year,
deposited
a
subterranean
cable
between
Berlin
and
Frankfort-on-the-Main.
Next
year
a
second
cable
was
laid
from
the
Capital
to
Cologne,
Aix-la-Chapelle,
and
Verviers.
In
1847
the
subject
of
our
memoir
had,
along
with
Mr.
Halske,
founded
a
telegraph
factory,
and
he
now
left
the
army
to
give
himself
up
to
scientific
work
and
the
development
of
his
business.
This
factory
prospered
well,
and
is
still
the
chief
continental
works
of
the
kind.
The
new
departure
made
by
Werner
Siemens
was
fortunate
for
electrical
science;
and
from
then
till
now
a
number
of
remarkable
inventions
have
proceeded
from
his
laboratory.
The
following
are
the
more
notable
advances
made:--In
October
1845,
a
machine
for
the
measurement
of
small
intervals
of
time,
and
the
speed
of
electricity
by
means
of
electric
sparks,
and
its
application
in
1875
for
measuring
the
speed
of
the
electric
current
in
overland
lines.
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