Lab
Library
Journal
Shop
Sign in
to keep
Share image
1
281
Heroes of the Telegraph
·
John Munro
226
One
day
a
workman
in
Edison's
laboratory
caught
up
a
crying
child
and
held
it
over
the
phonograph.
Here
is
the
phonogram
it
made,
and
here
in
England
we
can
listen
to
its
wailing,
for
the
phonograph
reproduces
every
kind
of
sound,
high
or
low,
whistling,
coughing,
sneezing,
or
groaning.
It
gives
the
accent,
the
expression,
and
the
modulation,
so
that
one
has
to
be
careful
how
one
speaks,
and
probably
its
use
will
help
us
to
improve
our
utterance.
By
speaking
into
the
phonograph
and
reproducing
the
words,
we
are
enabled
for
the
first
time
to
hear
ourselves
speak
as
others
hear
us;
for
the
vibrations
of
the
head
are
understood
to
mask
the
voice
a
little
to
our
own
ears.
Moreover,
by
altering
the
speed
of
the
barrel
the
voice
can
be
altered,
music
can
be
executed
in
slow
or
quick
time,
however
it
is
played,
inaudible
notes
can
be
raised
or
lowered,
as
the
case
may
be,
to
audibility.
The
phonograph
will
register
notes
as
low
as
ten
vibrations
a
second,
whereas
it
is
well
known
the
lowest
note
audible
to
the
human
ear
is
sixteen
vibrations
a
second.
The
instrument
is
equally
capable
of
service
and
entertainment.
It
can
be
used
as
a
stenograph,
or
shorthand-writer.
A
business
man,
for
instance,
can
dictate
his
letters
or
instructions
into
it,
and
they
can
be
copied
out
by
his
secretary.
Callers
can
leave
a
verbal
message
in
the
phonograph
instead
of
a
note.
An
editor
or
journalist
can
dictate
articles,
which
may
be
written
out
or
composed
by
the
printer,
word
by
word,
as
they
are
spoken
by
the
reproducer
in
his
ears.
Marker
Marker
Fine marker
White-out
Fine white-out
Circle
Paint
Unmarker
Hand
Scalpel
Dice
Sieve
Purify
Undo
Redo
Start over
