New-York tribune., 1902-12-22
MARCONI ANNOUNCES SUCCESS
WIRELESS COlLIJNIC4 TION ACROSS THE 4TL4NTIC
FROM CANADA TO CORNWl4LL.
Messages by the General Of Canada the Kings Of
ENGLAND and HahE

for him reply. Communication both ways. for
more than a hundred miles, possible only after
Cape Breton reached.
AT Table Head. Glace Bay. near Sydney. In that
province the work of equippng a station for
transoceanic communication has been in process
during the last few months. This is practically
duplicate of the station Cape Cod Before
the close of last year there had been erected at
the latter point great circle of poles which were
TO sustain the vertical wires needed for trans
atlantic MESA ges. The construction made
quate, and the poles soon blew down. An entirely
different plan has since been adopted there. At
Poldhu there also circle of poles originally
These too met with mishap during the last few
months The reconstructed station in Cornwall
has now been modelled after those at able Head
and South WeIlheet (Cape Cod). Table Head is
about tventy-three hundred miles from Porohu.
and Cape Cod five hundred miles further
The following description will Mt all three stations;
Four square wooden towers have been erected at
this point. Each measures Is feet across at the
base, is 9 to II feet across at the top and
attains a height of 2l5 feet from the earth The
towers stand the corners of square, whose
SIDES arS 210 feet long Each one is cross braced
with steel wire rope such is used in rigging
yacht Then all four are connected with one an
other by diagonal stays. Finally. TO render the
structure still more rigid and windproof, stout
cables are run up the tops of each pair OF
towers on all sides and secured to anchorages in
the earth So much for the architectural features
Of the station. Now for the electrical equipment
n the four horizontal DrlGgeS winch
connect the. tops the towers suspended nifty
conner cables The cables composed of seven
strands an eighth of inch in diameter. tightly
| twisted together. Outwardly these cables look
like single wires at short distance. but In reality
tbere are three hundred and fifty wires on a SIDE
- so,,rtaan hundred in all. Perhaps the reason
for using many fine strands instead Of a few
large rods is secure larger amount or surface
for a given amount of copper 1t VIII thus pe seen
, that the solitary vertical wire OF the original
aptC h1
rp,,itinlied Since the length of a Hertz wave Is
four times the length of the vertical wire. OF
antenna waves far from $50 feet Cor Il SiNth
of a mfle) long should be developed This CORE
sponds to a frequency of about 11oooN second.
The fftv cables OF each of the four groups con-
verge a little they go downward. ana also IN
cline slightly the centre of the quadrupieN
edface The lower ends. therefore, are arranged
along the sides a square much smaller than mat
formed bv their supports at the top. They ter
inmate of course in the operating room OF the
station
It is expected that Mr. Marconi will retain the
now famous coherer his receiving instrument
for the nresent although he has invented substi-
tute for it. gnetic detecter which In some re-
suects is more satisfactory. When he wishes 70
! insure non-interference he will doubtless employ
The tuning system invented by Professor NJ l.
Pupn of this city. whose rights he purchased last
| spring go
In the transmitting apparatus transformers will
he substituted for the old-fashioned induction coil
The spark gap will be scarcely more than an inch
long but the spark itself will be widened or thick
ened greatly by the shortness Of the interval 1t
| will be produced between glObuar terminals. two
inches in diameter. An alternating current, gen
Grated by a forty horsepower dynamo. Will do the
| work The voltage will be raised by the trans
formers from 2OtD, at which the current Is to be
| generated, to 10000 Condensers and other cleo
trica appliances will increase this still further
Thus a voltage of from 50O90 to 70,co0 will be Sc
cured The dynamo will be driven by two twenty
two horsepower gasoene engines. run in combina-
fioD