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281
Heroes of the Telegraph
·
John Munro
92
Various
devices
are
employed
at
different
stations
to
cure
these
local
complaints.
The
electrician
soon
learns
to
diagnose
and
prescribe
for
this,
his
most
valuable
charge.
At
Aden,
where
they
suffer
much
from
humidity,
the
mouse-mill
is
or
has
been
surrounded
with
burning
carbon.
At
Malta
a
gas
flame
was
used
for
the
same
purpose.
At
Suez,
where
they
suffer
from
drought,
a
cloud
of
steam
was
kept
rising
round
the
instrument,
saturating
the
air
and
paper.
At
more
temperate
places
the
ordinary
means
of
drying
the
air
by
taking
advantage
of
the
absorbing
power
of
sulphuric
acid
for
moisture
prevailed.
At
Marseilles
the
recorder
acted
in
some
respects
like
a
barometer.
Marseilles
is
subject
to
sudden
incursions
of
dry
northerly
winds,
termed
the
MISTRAL.
The
recorder
never
failed
to
indicate
the
mistral
when
it
blew,
and
sometimes
even
to
predict
it
by
many
hours.
Before
the
storm
was
itself
felt,
the
delicate
glass
pen
became
agitated
and
disturbed,
the
frail
blue
line
broken
and
irregular.
The
electrician
knew
that
the
mistral
would
blow
before
long,
and,
as
it
rarely
blows
for
less
than
three
days
at
a
time,
that
rather
rude
wind,
so
dreaded
by
the
Marseillaise,
was
doubly
dreaded
by
him.
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