The Washington herald., 1915-10-31

hitting . message can listen IN and pick
up every word that Is spoken.
There are also other objections to the
wireless which might be summarized as
the static conditions, encountered nearly
all the time; severe atmospheric disturb
Ehces. as during thunderstorms, etc, and
Interference by other stations cutting in
and obstructing the smooth Transmission
OF messages"
Nikola Tesla, one Of the first scientists
TO experiment with wireless telephony,
does not agree with other experts on the
limitations of the aerial Messages may
be talked around the world, pictures sent
by wireless half way across the globe and
absolute secrecy maintained, he declares,
in the following statement given out
after the success of the Arlington-to-
Honolulu test:
THE experts carrying out this bril-
liant experiment are naturally deserv-
ing of great credit for the skill they have
shown in perfecting the devices. These
are OF two kinds: First. those serving
to control transmission. and, second.
those magnifying the received impulse.
That the control OF transmission Is per-
feet is plain to experts from the fact that
the Arlington. Mare Island. and Pearl
Harbor plants are all inefficient and that
the distance OF telephone communication
IS equal to that Of telegraphic transmits
sion. II Is also perfectly apparent that
tho chief merit of the application lies in
the magnifCation of the microphonic i'm
pulse. II must not he IMAGINED that We
deal here with new discoveries. The i'm
prOvement simply concerns the control OF
the transmitted and the maCnifCation OF
the received impulse. but the wireless
system is the same. This can never he
changed.
That It is practicable to project the
5000 miles, but clear across the ClOhp. I
demonstrated by exDeriments + Colorado
in 1899. II is difficult for tne layman
to understand. but it is an absolute fact
that transmission through the earth with
the proper apparatus Is not more difficult
than the sending Of a message on a wire
strung across a room. This wonderful
property OF the planet. that. electrically
speaking. is through its very bicness
small. Is OF incalCulable significance for
the future Of mankind
These tests made between Washing
ton and Honolulu will act as an immense
stimulus to wireless telephony and would
be OF much more value to the world IL
the principles OF the transmission were
understood. But they are not Even
now. fifteen years after the fundamental
principles have been demonstrated and
the possibilities shown, there are many
experts in the dark
For instance, II Is claimed that static
disturbance will fatally interfere with
the transmission. while. as a matter of
fact. there is no static disturbance DOS
sible in properly designed transmission
and receiving circuits Quite recently I
have described. in a patent. circuits
which are absolutely immune to static
and other interferences-so much so that
when telephone is attached. there is alb
solute silence, even lightning in the i'm
mediate vicinity not producing click OF
the diaphragm, while in the ordinary tel
ephonic conversation there are all kinds
OF noises. Transmission without static
interference has many wonderful proper
ties besides, first OF which is that I'M
limited amounts of power can be trans
mftted with very small loss.
Another contention is that there can
he no secrecy in wireless telephone
conversation. say it is absurd
to raise this contention. when 1t is posi-
lively demonstrated by experiments that
the earth is more suitable for transmits
sion than any wire could ever be. A
wireless telephone conversation can be
made as secret as thought
81 have myself erected a plant for the
purpose of connecting by wireless teis-
phone the chief centers of the world ana
from this plant as many as a hundred
will be able to talk absolutely without
interference and with absolute secrecy.
The plant would simply be connected
with the telephone central exchange Of
New York cit. and any subscriber win
be able to talk to any other telephone
subscriber in the world, and all this
without any change in his apparatus
This plan has been called my world sys-
tenn. By the same means / propose also
to transmit pictures and project images,
so that the subscriber will not only hear
the voice, but see the person to whom he
Is talking. Pictures transmitted over
wires Is a perfectly simple art practiced
today. Many inventors have labored on
1t, but the chief credit is due Professor
Koru Of Auntch"