New-York tribune., 1922-06-17


ton has been achieved by reflected
waves Speaking OF this Mr.. Marconi
said
The experiments have been made
with Mr.. Franklin OF our English com
pany using wave-lengths Of two meters
in such a way .tAt the waves arc re-
hected and directed TO a definite point
which we wish TO communicate. This is
done in the same manner as light is re-
Elected by a mirror.
The surprising thing is the fact that
this beam remains almost constant
throughout. and does not increase 10
any appreciable extent in its diameter.
With this system we have been able to
cover distances Of 100 miles in such
way that no one. except those in a
direct line Of the beam. can receive the
conversation.
Think how useful that would be
here" he continued. sweeping his arm
toward the stretches Of the river.
where you have so many broadcasting
stations operating, because you could
communicate without Interference
81 this point Mr.. Marconi evinced a
Armstrong invention, because Of its
great efficiency on short wave recap
tion. The astounding fact connected
with Marconis latest system Of re-
fectcd waves, is that II deals with
electrical currents alternating az the
stupenduous rate Of 150,000,0O0 cycles
per second. In ordinary lighting sys-
tens. current alternates az the rate OF
GO cycles per second.
Cheaper Than Cables
Coming back TO his nrst love-wire-
less telegraphy-Mr Marconi said the
cxperments he had conducted on the
Atlantic clearly indicated II was pos
gible 10 send messages completely
around the world, and that wireless
would be cheaper than cables.
During the cruise from Southsmp-
ton" be said. Il experimental mostly
with automatic apparatus for high
speed in wireless telegraph transmts-
/ sion. We have so far developed
/ speed Of 200 words a minute. we ex-
+ meet 70 90 much higher than this.
Another series Of important tests
made during the voyage. he said. were
with high and low frequency filter sys-
tems to eliminate the effect Of static
Considerable advances had been made,
he added.
The present visit Of Mr.. Marconi IS
his cirhty-ffth 20 this country. he
will deliver an address before JOINT
meeting Of the Institute Of Radio En-
gineers and the American Institute OF
Electrical Engineers. covering the latest
dovelorments in radio communication.
With him on the Elettra is CASTOR
Nathieu. a Belgian radio expert.
The Yacht is the largest Italian pri-
va.elv owned craft which ever entered
This port. Il is commanded by Captain
Rafael Liuro, carries a crew OF twenty
seven men and is Of $50 tons register.
The radio laboratory is in forward
cabin and contains everything neces-
sary for successful experiments. Inc
oerrnanent equipment includes the
standard Ia kilowatt quench gap trans
mitter for short wave wireless
telegraphy and a special 3-kilowatt con-
tinuous wave transmtter using large
vacuum tubes, which can be used either
for telegraphy or telephony. This set
has q daylight range OF 1000 miles
With Il Marconi does broadcasting on
his own account and has talking ma
chine which he uses for brodeasting
music.
Huge Direction Finder
The center Of the laboratory is taken
up with a huge loop aerial designed
FOR special direction finding experiment
tai work. Practically all the receiving
equipment is arranged so that II can
be used either in standard form or be
quickly changed FOR special expert
mcnts.
In the navigating room there is
standard type OF Marconi direction
finder which the captain uses in navi-
eating the ship. This apparatus IS used
IN conjunction with two large loop
ccria.s permanently rigged from guy
lines between the masts in such man
ncr that there is a fore-andaft loop
and O thwartships loop. This system
eliminates danger in foggy weather.
/. is now eight years since last saw
Mr.. Marconi, but he has changed very
little and has not aged perceptibly. He
retains his enthusiasm for radio e1-
perimentation and could scarcely find
words 20 express his pleasure at the
tremendous interest in this country.
"ln the development Of the radio
telephone and the methods Of broad
casting." he said, "and in the public
interest. the United States is far ahead
nj Furope. This. Of course. is due 20
the fact that many OF the best engi-
neers in the world are in this country"
During his brief stay here Mr.. Mar
conf will visit tne important broad
casting stations in this vicinity and
will deliver a speech from them.
While the Elettra was steaming up
.be river a flying boat Of the Aeroma-
rine Airways, carrying Major Loring
Pickering. Of The San Francisco Bulle-
Tin" and Captain II. A. Bruno cireled
over her. Il was piloted By d. G. Rich
ardson. Marconi later received them
on his Yacht and accepted an invitation
10 Az around the city Saturday.
Sheedy Succeeds Frey