New-York tribune., 1902-10-28
TIRE TABLE HEAD STATION.
EQUIPMENT LIKE THAT AT PoLDHU AND
CAPE COD.

EQUIPMENT LIKE THAT AT PoLDHU AND
CAPE COD.
Prior TO last December the greatest distance COW
cred uy wireless telesraphy scarcely exceeded a
hundred miles Earlv II that month Mr.. Marcohi
visited Newfoundland, ostensibly 10 establish
station Tor reporting passing ships But he also
conducted experiments secretly 10 discover whether
messages could he sent across the ocean by his
system. Without telling the world about il in ad-
vance ne had equipped station al Poldhu Corn
Rau. with more powerful transmitting apparatus
than had been employed anywhere up 10 that time
While on Signal Hill Newfoundland, about eigh-
roen hundred nautical miles from Poldhu MI
Marconi received faint signals-the letter - sew
ersl times repested-both December L ana
December - bis vertical wire was sustained by
a kite whose unsteadiuess made il difficult 10
obtain uniform results. one or TWO small bal
looms. which ne tried for the same purpose. es-
capcd To the coherer Al the receiving station no
recordinr apparatus was attached. The signals
were caught only by the ear with the aid Of tele-
phone. Under the Circumstance some scepuclsm
was felt among elecucal experts as 70 the charac-
Ter OF the performance. II was deemed creolnle
that Mr.. Marconi whose honesty no one ques-
TONED, might possibly have been deceived There
was no independen; testimony 20 conhrm his he
N,i.
al doubt vanished however when TIE next i'm
u0rtanI was made Mr- Marconi was then On
the steamship Philadelphia. his way 10 Amer
ioa. Al this time not only did he attach record
!ng apparatus his receiver hut he also obtained
certificates from the ships Officers as 10 his lat-
jude and longitude at certain critical periods.
Thus his distance from Podhu was established
beyond question. on February 2. when l55li2
miles away, a distinct message, made up OF words.
was received shipboard or the following day
signals were recognized az distance OF 2oss miles
The interval equal TO- or Ereater than, that
between Poldhu and Signal Hin The Philadelphia
tests rendered il highly probable therefore. that
IL mis- y rg n he
nal Hin experiments.
During the last few weeks messages have been
sent from Poldhu 10 cruisers in Russian waters
and also 10 Spezzla. italy not fsr from Genoa In
neither instance was the distance over one thou
sand miles. These incidents possessed some per
sonal and political importance. but added nothing
70 the previous demonstrations Of the possibility
of long distance work. The King OF Italy kindly
placed AT Mr.. Marconis disposal the warshp Carlo
Alberto last MONTH for the purpose Of visiting
Cape Breton. She sailed from Spezzia just before
the close OF September. The vessel equipped
with receiving instruments. but not with a trans
m!tter Of sufficient power 10 send very far. II was
expected that attempts would be made. both az
SpezZia and Poldhu. talk 10 Marcon this
voyage across the Atlantic. but il cid not appear
S,,p 49, ~ 1lora nan p ri,ndTed miles was
possible only after Cape Breton was reached
Al Table Head. Glace Bay. near sydney. in that
province, the work Of equipping a station for
laiisoceallG communication 5as Deeh N W ~ ~ =
during the last feW months IhlS Is HraeuG55liy a
duplicate OF the new station on Cape Cod betore
The latter point great circle OF poes Mflch We
sustain the vertical wires needed for trans
quate and the poles soon blew down. An entirely
different plan has since been adopted theEe;; Al Al
PolGhu there also circle OF poles orlElnalls
These. TOO, met with uishap during t.se aSt ie"
months The reconstructed station in Cornwall
and South wellheet Cape Cod Table Head is
and cane COO some fve hundred miles further.
The following description viii II all three sta
-Four square wooden towers have been erected al
ms point Each measures = leea a,IosS a. S ~
sJtains height Of rs feet from the earth. The
sides are 2lO feet long Each is cross braced
with steel wire rope, such as Is USED IN I!gslhg
ga cht. Then all four are connected with eaGh
,.S,rs 1-ei i96 r0+rs ri..i5 and v,indproof stout
~ -tl@le 91.-! . - T. - 81 esch nair ~
towers all sides. ana secured 10 anchora6es IN
of @ the station HoW for the electrieai equipment
From each Of The four horizontal bridges when sih 2
connect the tops of the towers are suspended nfty
copper cables The cables are composed Of seven
twisted foret6er OutWardly these cables look
hike single wires ~ short distance, but In reality
or fourteen hundred in all Perhaps the reason
Tor using many me stranas nSteaI , 81 ot rfsse
~, tb soIiTsyv ..Verfiesi wire Of the origina
MsTconi experfr1ents has now been enormously
multiplied Since the length Of a Hertz wave IS
antenna waves not far from SEQ feet lor sixth
OF mile) long should De aeIel9pea % 5 ms CORE
The nifty cables Of each OF the four groups con
verge little as they 90 & s aiI o 5r,i,y m
e1ifce The lower ends. therefore. are arranged
along The sides Of square much smaller than tha'
formed BY their supports ~ the top They ter
inmate of course. in the operating room OF me SD
ZION
now famous coherer hrs receiving instrufnefl'
for the present. although he has invented suost-
tute Tor st. q magnetic Cete5ter. which IN some re,
spects Is more satisfaciorv When he wishes "a
insure interference he viii doubtless employ the
tIning system invented by Profess or NJ. / Pupln
az This citv whose rights he purchased last spring
In the Transmitting apparatus tansIoIh,eis vi wi
be- substituted for the old-faShioned nducuon coz
The spark gap Will he scarcely more tnah an me- 81
thickened greatly by the shortnss q me mere
IN viii be rroduced between globular terminals
tur, inches ir diameter. An alternating current
generated bv "a forty horsepower dynamo, wlH a'
TIE work The voltage viii he raised by the trans
formers from 20po at which the current Is 10 ne
,erars.a5 - "a eo C0ndenscrs and other cleo
frf-5i srrlionccs Will Increase this stiN further
Thus a Voltage Of from 5eD00 10 70oo VIII be Sc
cured The dynanno will be driven ny two twenty
two horsepovger cosolene engines, run In comma