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281
Heroes of the Telegraph
·
John Munro
107
Although
much
engaged
in
the
advancement
of
telegraphy,
he
was
also
occupied
with
his
favourite
idea
of
regeneration.
The
regenerative
gas
furnace,
originally
invented
in
1848
by
his
brother
Friedrich,
was
perfected
and
introduced
by
him
during
many
succeeding
years.
The
difficulties
overcome
in
the
development
of
this
invention
were
enormous,
but
the
final
triumph
was
complete.
The
principle
of
this
furnace
consists
in
utilising
the
heat
of
the
products
of
combustion
to
warm
up
the
gaseous
fuel
and
air
which
enters
the
furnace.
This
is
done
by
making
these
products
pass
through
brickwork
chambers
which
absorb
their
heat
and
communicate
it
to
the
gas
and
air
currents
going
to
the
flame.
An
extremely
high
temperature
is
thus
obtained,
and
the
furnace
has,
in
consequence,
been
largely
used
in
the
manufacture
of
glass
and
steel.
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