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281
Heroes of the Telegraph
·
John Munro
280
About
1852
he
began
to
occupy
himself
almost
exclusively
with
electrical
science.
His
most
conspicuous
discovery
is
that
pressure
diminishes
the
resistance
of
contact
between
two
conductors,
a
fact
which
Clerac
in
1866
utilised
in
the
construction
of
a
variable
resistance
from
carbon,
such
as
plumbage,
by
compressing
it
with
an
adjustable
screw.
It
is
also
the
foundation
of
the
carbon
transmitter
of
Edison,
and
the
more
delicate
microphone
of
Professor
Hughes.
But
Du
Moncel
is
best
known
as
an
author
and
journalist.
His
'Expose
des
applications
de
l'electricite'
published
in
1856
ET
SEQ.,
and
his
'Traite
pratique
de
Telegraphie,'
not
to
mention
his
later
books
on
recent
marvels,
such
as
the
telephone,
microphone,
phonograph,
and
electric
light,
are
standard
works
of
reference.
In
the
compilation
of
these
his
admirable
wife
assisted
him
as
a
literary
amanuensis,
for
she
had
acquired
a
considerable
knowledge
of
electricity.
In
1866
he
was
created
an
officer
of
the
Legion
of
Honour,
and
he
became
a
member
of
numerous
learned
societies.
For
some
time
he
was
an
adviser
of
the
French
telegraph
administration,
but
resigned
the
post
in
1873.
The
following
year
he
was
elected
a
Member
of
the
Academy
of
Sciences,
Paris.
In
1879,
he
became
editor
of
a
new
electrical
journal
established
at
Paris
under
the
title
of
'La
Lumiere
Electrique,'
and
held
the
position
until
his
death,
which
happened
at
Paris
after
a
few
days'
illness
on
February
16,
1884.
His
devoted
wife
was
recovering
from
a
long
illness
which
had
caused
her
affectionate
husband
much
anxiety,
and
probably
affected
his
health.
She
did
not
long
survive
him,
but
died
on
February
4,
1887,
at
Mentone
in
her
fifty-fifth
year.
Count
du
Moncel
was
an
indefatigable
worker,
who,
instead
of
abandoning
himself
to
idleness
and
pleasure
like
many
of
his
order,
believed
it
his
duty
to
be
active
and
useful
in
his
own
day,
as
his
ancestors
had
been
in
the
past.
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