Evening star., 1922-03-12
MARCONI SAYS NEXT TWENTY YEARS WILL
SEE GREATEST DEVELOPMENT OF WIRELESS

matters. All that is needed is a fair
opportunity for demonstrating the
possibilities and for conducting
similar service.
A few weeks ago representatives of
less telephony between Southwold in
Suffolk and Zandvoort, in Holland. =
On that occasion they conversed
freely for fifty minutes from the
respective wireless telephone sta
tions. and I hope that We may be !,
permitted shortly. to show that our
experiments between Southwold and
Zandvoort have a very practicable.
application. and that by linking up
this wireless circuit with the tele-
phone wires at the English and
Dutch ends it may be possible for
any one in London possessing a tele-
phone apparatus to ring up the ex-
change in London, ask for the wire
less route to Amsterdam and speak
to a corresponding subscriber in Am
sterdam. In this case the telephone
message from London to Southwold
would be relayed automatically by
wireless across the North sea. re- :
converted to land wire message be-
tween Zandvoort and Amsterdam and
received in Amsterdam exactly in the.
same way as a short-distance call over -
the ordinary circuit.
The Anglo-Dutch wireless telephone
circuit operates on a wave length
which permits Of very sharp tuning.
OF rrhn n q no
wireless circuits employed by the
military, naval or air services. 1t
would, in fact, be possible to multiply:
these routes and have quite a num-
ber of wireless circuits to the conti-
nent working in collaboration with
the land lines.
While the experiments at South
void are about to demonstrate the.
immediate practicability of wireless.
for trunk routes, whether they be
overland or oversee, q series OF ex-,
periments in another part Of this,
country have demonstrated that it is.
now possible to speak by wireless in
one particular direction. This dis
covery will remove the objection that
conversations can be overheard bya
those for whom they are not in
tended.
+ X
THE only commercial use for which
wireless telephony has SO far
been sanctioned in this country is
that of establishing communication
between the bar lightship in the
Irish channel and the offices of the
Mersey docks and harbor board in
|. Liverpool. INSTRUMENTATION is.
conducted almost every hour Of the
| day with this apparatus by men who
have had no special electrical train
| ing. and without any Interference
with the wireless service conducted
f! at the mouth of the Mersey by the
| Seaforth station, belonging to the
British post office. 1t Is absurd to
think that this is the only place
where a useful service can be per-
formed by wireless telephony.
need hardly dwell on the growth
| Of wireless telephony in connection
with aerial communications be-
lieve I am right in stating that every
| British machine regularly flying be-
I tween London and the continent fa 81
been fitted by the Marconi company
with the wireless telephone. and we
have numerous instances where there
{, instruments have contributed to the
safety Of the services and performed
other valuable functions. @- =
We have also demonstrated to one
Of the railways the possibilities Of
| wireless telephone communications
| az an auxiliary to the ordinary teIe-=
phone lines and 1t may be that 'poW'
(CoAtinued on Fifth Page.) :