The sun. [volume] (New York [N.Y.]) 1833-1916, 1901-12-29
extent the main principles may be developed
II is impossible to say at present.
Mr.. Marconi gives these details as to wire

II is impossible to say at present.
Mr.. Marconi gives these details as to wire
less telegraphy. Fog is the ideal weather
for his business. The humid atmosphere
helps, he supposes. He finds that where
IL is possible to send 100 miles in clear
weather. ITO miles is possible in fog.
To support the aerial wire the poles
should be about two hundred feet high.
Proximity 10 the sea IL an advantage; why,
Is unknown.
He does not now signal with parabolic
reflectors. With hem II was only possible
to signal between two positions within
! sight Of each other. and the rays were
| stopped by the curvature Of the earth.
His waves now radiate In all directions
and are caught by the tuned instrument.
| They only affect a tuned radiator which
is exactly In their tune. All steamers are
tuned alike 30 that they can communicate
with each other II In distress. Otherwise
all stations are tuned differently.
Tuning means the frequency with which
the electric shock goes up and down the
aerial wire. This varies from 100000 times
a second to 1 900, 900 a second.
The system is available for about two
thirds Of the distance on land that it is on
the ocean. High hills do not constitute an
obstacle, but the ground itself acts adj
versely. A high pole is needed, but it is
not al advantage that 1t be a high hill. A
low-lying spit near the ocean Ia best.
Mr.. Marconi, while well pleased with the
result of his experiments, evinces no undue
elation at the fact. He Ia satisfied that the
principles underlying all Of his expert
ments in a minor manner have proved
- l.. .ll.
1t is merely requisite that sufficient
power should be generated at one Of his
stations and projected into space for a
message to be sent in time to the utter
most ends OF the earth. 1t was inevitable
hat in an experimental process such as
thus vas with the influence Of an unstable
kite, air currents and the like the signals
should not be Of an eminently satisfactory
character.
1t requires months Of testing before an
substantial enlargement of the scope of
the system Is possible and II will he 20 In
this case more than ever, but the signals
we're conclusive. No other agency could
deliver them except the Poldhu station,
and the safeguards which Mr., Marconi
had provided and which cannot, for bust
ness reasons, be given in detail, we're such
Us to make a mistake impossible.
His chief assistant, Mr., Kemp, received
the signals IA well az Marconi. and they
both agreed as to the genuineness of the
message. With his characteristic modesty,
Mr.. Marconi ~refrains from outlining the
possibilities which the future has in
store for this discovery. contenting HIM
self with the statement that ere many
months he would be in a position to prove
beyond any question of reasonable doubt
that signalling between Cornwall and
st. Johns was an easy matter.
Whether il is possible to utilize for COM
mercial purposes the lesson contained
in the discovery is, of course, yet undeter-
mined. but az only three years ago the limit
OF successful wireless signalling was about
five miles and az last week messages were
being sent between ships and stations 200
miles apart and as now readable signals,
under exceptional conditions, of course,
rave been projected 1880 miles, II is easy
90 SEQ that but a short time must mako
transatlantic commercial telegraphing by
the Hiarconi system ar accomplished fact.
For practical purposes Mr.. Marconi
finds that a wire 200 feet high elevated 10y
a pole, balloon or other contrivance IA al
ideal one for his purpose. After that, all
he requires is abundant power for tho OK
polling Of the electricity and diffusion Of
these signals.
The curvature Of The earth docs not in
%iuriouslv affect the message II was
thought so for a considerable period. but
this experiment has proved IA" contrary
4 more serious difficulty l. the nature
Of the ground where the station II located
Some geogloical formations assist tho
apparatus. others minimize it, value. II
p possible on certain spots to communicate
200 miles, on others only 100 miles
The presence Of iron formal ion T. in
iurious The Typographical variations 10y
land cause friction. which lessons It's fore"
when a large area j. op"fattSl or, ami this
l. tru" ~ a smaller extent Of ia" ocean. hu1
ruw.r can be- provided To- overcome iHI-,
aud Mr. Narcoui r. 60 add extra power ru
ii- Puldhu station, ,o iLdt the signals
may b. transmitted H,ru-~ here with much
more pronounced rfe'T
His a--ir'ait- Nil remain 90 receive tie
sIgual-. hey cannot return item ~ hey
are not "tdipp"i with heavy lattrrt~ GA
the r,Io. but there NIl ie a|hUIdaui pru'f
supplied bN thr ruDo--s ~ TIE -rrr- =
oAIcrimrnts vLicl Marclui will initiate"
On tie urar future Go demonstrate vlat 10
viii be- q s-ihlc T. tu Wien a sending slartuu
Do rrt up iu tlir NiriIli