Evening star. [volume] (Washington, D.C.) 1854-1972, 1929-04-07
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tors said Bell prayed for the coming
OF the judges. Soon they came. learned
men, stroking flowing boards and carry
Ing in their heads the culture hil-
mainly had spawned during the past
century. They knew every worthy in
Vention, every advance in literary and
philosophical thought. every movement
LOT human Improvement. Now, this
playthtng on Mr.. Bells table was a de-
fools like Mr. Bell.
The judges were about to pass on
when, In melodramatic moment, Dom
Peoro, young Emperor of Brazil, fol-
lowed by the plumage that goes with
royalty, placed the receiver to his ear
ana uttered cry that jolted the COM
mittee of judges:
My God! 1t talks"
To be sure it did. At once the emil
nentos declared Bells telephone to be
one OF the greatest inventions In the
world. ',-S
WE'D in Bonn. Germany, Heinrich
Hertz, professor at the University
OF Bonn. In 1877 he created electric
sparks. flashes Of artificial lightning in
MS laboratory. He then managed to
prove that electricity flows in waves.
that 1t is reflected from suitable sur.
faces much as light is reflected by mir
rors. ,.~-.-' ~
Hertzian wavesl Spanning continents
ano oceans. Circumradiating the globe.
But the early scientists had reasoned
What would be the practical advantage
OF telegraphing across space?" They
sent It several hundred feet, as a mat
Ter OF scientific experiment
In Sir William CrookeS lived the tenn
permanent OF a dreamer. He dared
imagine "a new and astonishing
world Rays of light will not pierce
London fog radio makes a
solid wall transparent!
Here, then, Is revealed the bewilder-
ing possibilities of biography without
wires. posts, cables or any of our pres
ent appliances.
What, therefore, remains to be dis
covered Is a more certain way of gen.
Grating electrical says Of any desired
wave length, from the shortest, say, a
Few feet In length, to those long waves
whose lengths are measured by tens,
hundreds and thousands of miles.
Secondly, more delicate receivers
| which will respond to wave lengths be-
tween certain limits and be silent In
others.
ANY two friends living within the
radius Of sensibility Of their receiving
instruments -. could communicate
by timing the impulses to produce long
and short intervals in the ordinary
Morse CODE"
Thus dreamer described radio COM
munication before We had radio COM
munication. But no one dared tread the
| magic space where new discoveries
awaited The professors drowned them
selves in books and the scientists
| harangued over old theories, waiting
| for a boy to reach his adolescence
| Guglielmo Marconi. half Irishman, half
| Italian.
He sent sparks from > ---~se key and
| they were received b. = { or. The
EYE" saw when the .-sy was On and
was blind" when the key was up. IN
visible Geographic flashes shot back and
forth. How simple. Inventing nothing
new, Marconi assembled all the old ra-
dio devices and perfected radioteleg-
raphy.
Feeble voices in the air. Experiment.
ers strained ears and shouted, ''Louder!"
Came De Forest. The Yankee invented
a grid to be inserted between the glow
ing filament and metal plate of radio
tube. This was the throttle for radio.
1t could feed energy or cut 1t of. 1t
magnified. II you want the loud
speaker. said De Forest, add another
tube He magnified radio signals mill
lions of times. De Forest tubes were
impressed into the telephone service, so
that the transcontinental telephone
voice became q reality. Speaking from
Washington to San Francisco, mans
voice is amplified 0,000.000,000 times.
Shrivel space! Another fairy tale
come true. Are all madmen geniuses?
The other day q savage tribe In
Beluchoohoolan sat around radio
and heard President Hoover talk about
enforcing the eighteenth amendment.
D ADroTELEPHoNY may be Q great
~ invention, but some authorities
believe that canning and freezing hui
, man speech are still greater.
The voices of men resounded through
the ages, but they few unbridled to
the winds, because there was no cam
ming machine. Edison, while expert
menting with telegraphy, noted that q
musical note was emitted by the rapid
passing of o point over indentationS
on paper. He wrote in his notebook:
There's no doubt shall be able to
store up and reproduce the human
voice at any future time"
"I'll bet you q box Of cigars your
instrument doesn't work." Edison's fore
man said.
wen see," said the inventor.
He finished q model, wrapped piece
of tinfoil around cylinder. He turned
the cylinder by means Of q crank and
shouted into the mouthpiece:
MARY had q little lamb,
Its fleece was white as snow.
And everywhere that Mary went
The lamb was sure to go."
The recording process completed, he
turned back the cylinder. adjusted the
reproducing diaphragm and began the
rotation anew. Not word missing, the
tinfoil sent back, Mary had little
lamb"
Emile Berliner, q store clerk in the
Capital, gave the talking machine its
widespread popularity. He invented the
lateral-cut disk record HIS recording
and reproducing methods are used
wherever music and speech are canned.
Another rotable contribution by Ber-
liner is the radio microphone. Within