The star. (Reynoldsville, Pa.) 1892-1946, 1899-11-08
SENT messages WITHOUT WIRES.
NAVY MAKES A TEST.
Navy oinos, Witness q Satisfactory Demon.
s'raiIon Of Maroonrs Great Invention.
Teleprsphod Thirty mlles.

Mnrconi, the italian inventor OF wire
less tcegraphy. has demonstrated to
the ratistaction OF naval officers that
wireless tclcRrnphy can be used TO
rteat advantage nt sen. The cruiser
Ncw York and the battlcnhlp Maasn-
chuaetts returned to Now York last
Thursday nftcr three days. OF expert
mental work with the Mnrconi APP
rarntus.
The method of'tranamlitIng and re-
cclving messages by his system. M
now used, may be briefly explained m
follows.
a wire runs from the cnrth. or water
when aboard ship, 10 the instrument
ana thence to the top of mast. A
powerful alternating current " mndo 10
How M the wire by means Of an lnduc-
Ton coll, which " made alive by cloa-
ing Key similar 10 an ordinary Morsc
telegraph set, except that II IN much
lnrgcr. While the key ls closed the
rapid alternating currents pass up the
wire ana vet In motion electrical waves
In all directions a rapid opening aud
closing of the key produces n dot and II
| dash " made by holding the key down
n longer period
Thus the characters OF the Morse nj
| phnbot nrc made. and any telegraph
| operator cnn read what " sent or re-
| colvcd When nn instrument In not In
use for transmitting n switch dlscon-
| nccta the key and attaches n receiver
which IN likewise connected with the
mast on the earth. The electrical Inn
| pulses sent out by any other station
ARE caught by the wire at the mast nnd
| conveyed To the receiver. whcro they
| magnctlzc In mn extremely slight de-
gree small bar, enough To cause min
| ute metal flingH nearby To cluster
| about II. This closes another circuit,
| which works n recording instrument
| Ike the old fashioned telegraph regis
| ter. and sets n small hammer. called
| the "trappcr." Ia humping against the
glass tube which holds the bar nnd
| nlings.
As soon ~ the sending operator re-
lenses his key and stops the electrical
| impulses from flowing from HIS wire
the attraction Of the bar for the filings
ceases aud the humping OF thc"tnpper"
causes them to pun back Into place.
This opens the other circuit men
| toned, and the marker ON the register
drops back from the paper and ut the
same time the "tnppcr" stops. The
short and sustained Impulses from the
sender thus cause dots and dnshcs Ia
be marked on the paper 10y the regis
ter through the delicate but exnct
| work OF the "cohcrcr."
| A practical use of the wireless telo-
| graph that pleased all the officers
aboard the New York. especially Rear
| Admiral Farduhar ana Capt. Chad
wick. occurred Wednesday. While the
New York and Massachusetts. the lat
ter astcrn. were putting out to sea. the
| Marconi operator on the battlcBhlp
called the flagship up and
clicked out thnt there was n
| man overheard. The message waa
taken To the officers. who were cluster
er AFT, trying To make out why the
Massachusetts was hcaving to. The
battlcshlp's llfcboats were rapidly low
| "A All
| the rescue OF the unlucky incky.
| Signals were sent aloft notifying the
| flagship whnt had occurred. but during
| the 10 minutes occupied In displaying
the message Rear Admiral Farquhar
| had been In constant communication
with the Massachusetts by wireless
telegraph. and had learned that the
man overheard had caught the life
| buoy thrown by the sailor whose duty
II is to watch for such occurrences. and
was therefore not In much danger.
Rear Admiral Farquhar ordered the
| Massachusetts to report when the man
had been picked up. and half nm hour
later. while those on deck were watch
| ing the return OF the port lifcboat
through their glasses and wondering
which boat had succeeded In getting
him. the receiver In the instrument
| room recorded that the starboard life
boat. which had been hidden from View
from the New York. had made the res
cue and been hoisted aboard.
Beyond the simplest test the stabil.
ity OF the instruments to transmit and
| receive messages, the government
boards program called for long dis
| tunce transmission and interference
tests. on Monday afternoon the New
York hovered about the Sandy Hook
lightship and the Massachusetts, steam
| ed off To the east at about twelve knots
Constant communication was kept uT
| between the two members of the gov
ernment board on the two ships. the
instruments working without n hitcf
until the battleship had proceeded
about thirty miles. Then the recordlnp
of the impulses from the Massachusetts
by the receiver abroad the New Yorl
began to grow weaker. and at thirty
six miles became unreadable. Mr.
| Marconi expressed his regret at his in
ability to show the board transmission
at eighty miles, which would have beer
possible with more preparation.
a trust proposes to control the auto
obile business in both England ant