Evening star. [volume] (Washington, D.C.) 1854-1972, 1901-01-21

MARCONTs MARVELS.
He Now Has Portable Apparatus
| Adapted to Military Use.
| From, tho ToD,on Chronicle

MARCONFS MARVELS.
He Now Has n Portable Apparatus
| Adapted to Military Use.
From the London Chronicle
| In recent issue of the Daily Chronicle
| it was stated that Signor Marconi was con-
| Quoting a series of experiments In wireless
| telegraphy likely to have important results
| These experiments have been made at
| Poole, and sooner than was anticipated
| We are able to describe some of the de-
velopments. One of our representatives
! has had an interview with Signor Marconi
| in his little work room at Poole harbor
| where, surrounded by all sorts of unfamil-
| lar Instruments. he has for months past
| been experimenting In the utilization OF
| ether waves. Hitherto, the one serious
| drawback to wireless telegraphy has been
| that any one could tap the messages. This
difficulty Signor Marconi has now succeeded
| in overcoming.
Hitherto" he explained to our repre-
| sentative, 1.-The ether waves used for wire
| less telegraphic messages have been sent
| in promiScuous fashiou-that is to say,
| they could be detected by any suitable re-
| ceiver placed anywhere within the radius
| of action of the transmitting station. More
| over. If two stations in proximity happened
| to send off simultaneous messages, the re-
| receiving station within their radius would
| receive both messages. but they would be
| jumbled together. and consequently would
| in my new system will respond only to
| those ether waves to which they are
| tuned The possible combinations OF
tunes are infinite, and no two instruments,
therefore. can communicate with each other
unless they have first been expressly ar
ranged for such communications. so per-
feet is the new system that two mes
sages sent off from different stations can
be picked up by one wire. and that one
wire, passing through two receiving In
| struments. gives to each Its proper mes
sage. separate and distinct and without
| taking the other message.
"In this way" continued Signor Mar
| conf, lit will be possible to take one par
! ticular illustration, for an admiral to com
municate at will either with the whole of
| his fleet simultaneously. or with any par
ticular vessel. and he do this even IL
his own fleet should be split into two
squadrons, with a hostile fleet intervening.
and without his signals being understood
by the enemy.
To turn, however. from warlike to COM
nercial interests, Signor Marconi explained
that all vessels of q particular line will be
able to speak with their sister vessels with
out any possible intercommunication with
other vessels. Moreover. under the new
| conditions a land station, fully equipped
with the latest form of apparatus. can
| speak at will, and without fear of inter-
ruption to the service. with any one of a
| dozen other stations.
The longest distance over which Signor
Marconi can communicate across water Is
100 miles. and he has now ascertained that
the curvature of the earth opposes abso-
lutely no obstacle, which has hitherto been
supposed. to the transmission of messages.
Another important development OF the sys-
tenn Is the ability to communicate over
distance of more than thirty miles by
means of q metal cylinder placed upon an
ordinary chair. This will be of immense
advantage in military operations, for 1t
means that the whole apparatus for the
secret transmission OF messages can be
conveyed upon cart from one point Of
the field of war to another AS to the pos-
sibilities of communication across the At
| lantic, Signor Marconi's reply was that such
q scheme merely a possibility of the
future" AT the present time he said.
~ am not in the least concerned with this
particular problem" One great commercial
advantage however, will be that the great
ocean liners. except those that cross the
Atlantic, will be able to communicate at
almost any point of their voyage with every
part Of the world.
Hotel Arrivals.
Raleigh-E. r. Stephens and wife, Troy,
N. Y; Clark Howell and wife, Atlanta; j.
e. Rend Chicago; c. I. Kurtz. Columbus.
Ohio: A. H. Beardsley. Elkhart. Md: H.
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c.; E. T. Winston, New York: j. Wheless,
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cago; L. A. Simons. Buffalo; f. r. Corn
vail, st. Louis. Mo-: B. H. Christy. Pitts
burg. Pa; w. Mason, New York.
Gordon-Wm. NJ Bliss, New York; Mrs.
R. B. Hawley. Miss Hawley.
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cago; T. A. Lyman and wife. New York;
F'erd. Miller. Kansas City. No.; George o.
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ter. New York.
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