The Mellette County pioneer. [volume] (Wood, Mellette County, S.D.) 19??-1971, 1922-05-26

into general use for commercial pur-
poses. The longest telephone able
actually operating today is about lVV
miles in extent. AS a matter VI 1acl
ordinary cable telephony has not yeI
taken place between England and Hol-
land, although these two countries
have such intimate commercial reia-
items that there can be no question
about the demand.
The trouble in underwater cable
telephony lies in the very pronounced
distortion which takes place after the
electrical waves, which are the equiv
alent of the vocal sounds, have passed
a few miles through the cable. Even
In the twenty-odd miles etwee n
land and France 1t has been found
necessary to place on the ocean Ded
special appliances for overcoming this
distortion. These appliances add con-
slderably to the expense and upkeep
of the circuit.
Now, it is a curious fact that, al
though on electrical oscillation pro-
jected through an under-sea cable be-
comes rapidly distorted, an electrical
wave radiated across the ether by a
modern wireless apparatus retains It's
original characteristics however great
me distance over which 1t may travei.
In wireless telephony we convert
the modulations of human speech into
equivalent modulations of the cleo
tyical waves, and radiate them through
the ether until they strike the aerial
wires Of q receiving apparatus. There
they are reconverted into sound waves
such as can be recognized by the hui
man ear. AS the ether Is so elastic
as 70 allow these electrical waves to
maintain their original form, the ques-
ton of reception is little more thar
that of magnifying the incoming sig
mails.
Wireless speech has already taken
Mace across the North Atlantic ocean,
but the apparatus employed was OF
an experimental, rather than a com
mercial character, and therefore de-
velopment is necessary before n can
record transatlantic conversation as
a commercial possibility.
To conduct uninterrupted speech
over sea distances similar to that be-
tween London and New York will re
ouire. at any rate with our present
day experience, considerable power al
the transmitting end. Until a few
weeks ago I might have been tempted
70 estimate this power at the electrical
equivalent of over 1000 horsepower
but the experiments which l have beer
engaged upon recently on my yacht
the Electra, lead me TO modify my
estimate. Hitherto, as everyone con
nected with wireless is aware, we have
always found it necessary TO keeI
In reserve on commercial wireless cir
cults q large amount of electrical en-
ergy for the purpose Of breakin:
through terrestrial electrical disturb
ances. The sources Of these disturb
ances are not always clear, but the.
are such that at intervals during tn,
day, and notably in the summe
months, they set up in the wireless
receiving apparatus such a din o.
meaningless noises that II Is Difficult
to read the Systematically transmitte'
signal.
This new apparatus, which has beer
developed by engineers of my com
pany, makes it possible for us Il sif
the mixed wireless and non-wirelesi
impulses so that we obtain on u al
tomato recorders, or in the telephon'
receivers only the signals sent out b.
J the distant wireless stations. thinl