Evening capital and Maryland gazette., 1915-10-16
GREAT FUTURE FOR
WIRELESS PHONE
Navy Officials Enthusiastic Over
Success of Trials.
DISTANCES ARE ANNIHILATED
Voices From Wireless Tower at Airing
ton, Va, Heard Distinctly at
Pearl Harbor. Hawaii.

Navy officials are enthusiastic over
experiments resulting for the first time
in long distance wireless telephone
communication. BY this means the hu-
man voice has been successfully trans
mitted from the Arlington wireless
plant to Pearl Harbor. Hawaii, a dis
tance of 1900 miles.
This achievement. together with the
successful operation of device for au-
tomatically transferring tothe radio
telephone conversation originating on
metallic circuits was accomplished by
direction of Capt William H. G. Bull
lard. chief OF the navy's radio service.
service. in cooperation with the Amer
lean Telephone and Telegraph Com
pany and the Western Electric Com
pany From the United States radio
tower at Arlington Va. John Mills an
electrical engineer. sent his voice west
ward through the air over an ordinary
instrument connected with n powerful
wireless telegraph apparatus.
AT the naval station at Pearl Harbor
near Honolulu, Hawaii which is 1900
miles away in a straight line. Lloyd
Espenchled, another engineer in the
service of the American Telephone
and Telegraph Co was waiting with
receivers at his ears for the message
that was to come through the ether
the message which was to be started
at least. from Arlington in the hope
that il might reach the little island far
out in the Pacific IL did
The fondest hopes of the hundreds of
scientific experiments in the compa-
ny's service had been realized. Es-
penschied had heard Mills counting
"One, two, three, four" and then from
one to seven and from one to nine and
had reported back in his cablegram the
exact numbers which his colleagues
across the earth had given him as tests
He had heard Mills speak several SEN
tences. which he (Espenscied) copied
down and sent back in his cablegram
message to prove that the other engi-
neer's voice actually had reached him.
Only the day before the world stood
astounded at the news that President
Vail. of the American Telegraph and
Telephone Company had talked by
wireless to San Francisco-about $500
miles i'm an air line-to John j. Carly.
the chief engineer Yet the latter talk
compassed a distance almost twice as
great voice had sped through the
air for nearly 5000 miles When Mr..
Vail and the other officers of the COM
pany and their scientists got the glad
tidings they pointed out happily this
vista of the near future.
Wireless telephone conversation be-
tween New York and London. New
York and Paris. Berlin, Viena, Madrid.
even Petrograd Had the engineer in
Hawaii been equipped with a sending
apparatus such as the one at Airing
| ton. he could have met immediate vo-
cal reply to his colleague. But as was
also the case in the San Francisco test.
the station at Pearl Harbor was equip
ped only with a receiving "set."
When the next long distance test is
made, each station will have sending
and receiving apparatus so that a com
plete conversation may be had One
| of the big problems yet to be solved
in connection with wireless telephony
is static interference. according to ]. J.
Carly, chief engineer of the American
| Telephone and Telegraph Company.
'As an extension of the regular wire
| system" Mr.. Carty- said. "the field for
the wireless telephone is restricted
At certain times of the year, partic-
| ularly in the summer, static conditions
will make it use uncertain. Satatic
interference is something we know
| very little about and is one of the big
problems yet to be solved. We arc
| going after it.
The number of calls that can be
handled simultaneously on the wire.
less telephone is limited. but for emer-
gency use on long distances it viii be
invaluable, and for use in limited areas
it should prove great boon. 1t vii
be possible. for instance, for fishing
smacks and other small boats, unable
to afford a wireless operator, to carry
wireless telephone and be in imme
diate COMMUNICATION with the shore and
1