The Washburn leader. [volume] (Washburn, McLean County, N.D.) 1890-1986, 1900-02-24
SCIENTIFIC TOPICS.
CURRENT NOTES OF DISCOVERY
AND INVENTION.
Removable Billiard cue-sandow's Inn
provement In Dumb-bells - Wireless
TeleGraphy-sstisfsctory Lists Of the
Marconl System Made in Germany.
Hireles, relesraphy.

Wireless Telegraphy. +.
Nowhere have Signor Marconi's sue
cessful experiments with wireless tel
egraphy attracted more attention than
in Germany, and Don after his work
in this country during the information
al yacht races was completed the semi
official announcement was made IN
Berlin that similar experiments would
be made in Germany in the near fu-
ture, says the New York Herald. These
tests have just taken place on the
steamship Prince Sigismund and on a
land station, which was erected at
Laboe, near the entrance OF the hlel
harbor. The tests were conducted I'M
der the auspices of the German Naval
Society. At the bow of the vessel a
strong bronze wire was attached n
then connected with an insulator. In
the middle Of the wire and between the
masts was a net fourteen metres long,
one metre broad, and with meshes OF
five centi-metres in size. 1t was rolled
upon a cylinder and isolated. b IN
ductor, receiver and other parapher-
MALTA were placed in their customary
positions, while at Leboe a mast OF
thirty metres in height was erected
and the necessary instruments were
placed in the room Of a neighboring
house. During the first day messages
were sent a distance of thirty kilomet-
res, the vessel being the transmitting
point, and the station at Laboe h re-
ceiyer. Messages were then trans
mitted from Laboe, and, while the re-
suits were not satisfactory at first, sue
cess was constant, as soon as the dis
lance had been reduced to twenty kilo-
metres. On various days tests were
made at different distances, the maxi
mum being forty-five kilometres. on
which occasion the messages were
transmitted from Laboe and received
on the vessel. The smallest distance
was twenty kilometres. and the aver
age during the entire time was thirty
kilometres. The experiments at the
greatest distances were made on those
occasions when the transmitter was on
land and the receiver on board ship.
The best results were obtained at an
average distance of thirty kilometres,
as the instrument then worked with
out the slightest hitch. Atmospherical
conditions, it is said. did not In any
way influence the transmission or re-
ceipt of messages, and the instruments
worked quite al we'll when there was
heavy rain as when there was sun
shine. On the other hand, the smoke
Of the vessel provided indirectly detri-
mental, since it blackened the isolators
and to some extent prevented them
from working properly. This mischief,
however, was guarded against by
covering them with a light coating OF
oil. On the whole, say those who were
present, these experiments clearly
show that communication by means OF.
wireless telegraphy car surely be made
for a certain distance, not only from
one vessel to another. but also from
land to a vessel at sea and vice versa.
The conditions under which the ex-
periments were made were not the.
most favorable, it is pointed out. as no
steps were taken to adapt the steamer
for this special work, and 1t is only
reasonable to suppose that all the nee
essary alterations in the steamer must
be made II successful experiments are
to be carried out at a greater distance
than thirty kilometres. That under
proper conditions successful expert
ments can be made at a greater dis
lance than thirty kilometres is the
firm opinion of these German scientists
who have given any attention to the
subject.