Perth Amboy evening news., 1906-11-06
The WIRELESS
SYSTEM TODAY
The MarCOni Telegraph Is Ten
Years 0Id-Many Changes
Have Been Made.

years old. June 2, 1896, there was
filed in the British patent Office a
provisional specification ''for i'm
provemeints in transmitting e%lectri-
cal impulses and signals and in APP
paratus therefor" by m Guglielmo
M~arconi, residing at II Hereford
road, Bayswater, England, says the
Scientific American.
At the time this patent was APP
piled for the art of transmitting mes
sages without wires was wholly un-
known, in so far as its practice and
utilization were concerned, and the
drawing and descriptions of the inn
provements cited gave neither the
layman nor scientist an inkling that
the arrangement was one of the most
important since those first brought
out in the allied classes of telegraphy
and telephony, or that the young in
ventor was destined to take rank
with Morse and Bell as a genius who
had materially advanced civilization
by devising a new means for the
transmission of intelligence.
Exactly a decade has elapsed since
the filing of that memorable patent,
and the great and far-reaching prog
ress made in the art in the brief per-
iod past is well known. There are.
however, some salient features that
have been brought out in the devel-
opment of the new telegraphy that
are not so we'll known, and to these
attention may be appropriately called
at this particular time.
After the first successful trials
were made across the Bristol chan
mel between Lavernoch and Flat
Holm, a distance of 3.3 miles, by
Marconi, and during these notable
tests, in which he became cognizant
of the great value of using high aer-
ial wires and earthed terminals, the
feasibility of telegraphing through
space by the Hertzian wave method
could no longer be doubted, and all
other schemes for producing similar
results we're abandoned.
notwithstanding the favorable is
sue of the experiments, there was
yet much to be done before the sys-
item could be made commercially
practicable, and the young inventor
labored %zealously to extend the limi-
tations that hemmed it in on all
sides. Nor was he alone now in the
great work that confronted him, for
numerous Investigators on both sides
of the Atlantic became imbued with
the possibilities the new art offered.
To increase the range of signalling
was the first and most important step
and after that, the d~esirability of Sc
curing selectively, so hat a number
of messages could be sent in the same
field of force without suffering extinc-
ton.
Marconi was perhaps the most per-
sistent experimenter in the bridging
of greater distances, while very early
in the development of the new teleg-
raphy Lodge turned his attention to
the production of a selective system
by means of electrical resonance. Tho
former succeeded SO well in his task
that from three miles in 1897, he
was enabled to send and receive sig
O,OVV lulISS III lOO1t WIllIc lllt
latter, although he failed d evolve
a commercially selective apparatus,
led the way for the timing of the
sending and receiving circuits indi-
vidually and syntonizing them col
lectively.
The work of Lodge and his sue
cessors has resulted in the beautiful
open and closed oscillat-
ors and resonators, both close and
loose coupled, that give, in the re-
apparatus we have at the pres
ent time, the highest efficiency of OPP
Grafton with the least expenditure of
initial energy.
Important Features.
Another important feature of re-
cent date is the utilization of auto
detectors in connection with tele-
phone receivers as receptors for the
translation of incoming electric
waves into the aiphabetic code of
and dashes. This adjunct may
be attributed to American ingenuity,
and was a difficult but well taken
step leading toward the goals of ac-
curacy, rapidity and simplicity, for it
eliminates virtually all of the difficult
adjustments found in the coherer and
Morse register receptors, permitting
a very great increase in the speed of
reception, and greatly reduces the
number of essential parts of the
equipment. DeForest was probably
the first in the commercial field to
use the auto-detector and telephone
received, while Fessenden has con-
ferred a lasting benefit upon science
and humanity by his ingenious de-
tector, the liquid barretter, an instru-
ment that in it's sensibility, it's rug
gedness and it's simplicity is second
only to the telephone receiver of
Bell.
With these improvements chiefly
made within the past five years,
wireless telegraphy is all that the
most exacting critic could hope for
t, If we except selectivity, and in this
especial branch of the work there is
yet unlimited opportunity for the