New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1897-05-10
WIRELESS TELEGRAPH.
DESCRIPTION OF THE APPARATUS USED IN MAR
CONrS EXPERIMENTS.
From The London Mail.

From The London Mail.
A Daily Mali representative has been privileged
to see at St. Martin s-e-Grand demonstration of
mon Geographic "sounder'-from which operators
take messages by the sound Of the clicking arma,
ransmitter and passing through Two s9lid walls
received an explanation of the theoretical and the
practical parts of the new biography
system Consists Of an accumulation battery, cells
charged with electricity as watchspring is wound
'dashes' an Induction COLI giving an eight-inch
spark, and the wires connecting the three together
the two ends of which are connected TO the key
and battery, and half wound with thin wire. the
two ends Of which sodered to separate metal
rods each with large brass sphere or ball at It's
extremity II the key be closed for sh9r, or long
ing corresponding period through the thick wire
OF the coil and induces a current in the thin wire
The induced current rushes to the brass spheres
and in the i9r 9 b r q hume tne
an ebone vessel filed with oil and having a brass
ne With f 6s two sher Tse GPSs aa
shape 1t is not unlike big drum. with ball stuck
point the electrical waves are sent out in short
long sweeps that overcome all barriers and actuate
on instrument miles away. The current, having
left the transmtter In short and long waves which
alphabet travels through the air to the distant re-
ceiver that Is In electrical harmony with the trans
The receiver may be nkened to wire hoop
broken and separated at the break. At each side
strips form the receivers arms for collecting the
electrical waves approaching IT, local battery
and a telegraphic "sounder' instrument are intro
duced into q circuit with the wire hoop. that the
current from this battery will around the hoop
and through the 'sounder.'' But the hoop is
broken. and this current is not vigorous enough
to jump the gap the electrical circuit is not COM
pete and current will flow until II Is. The waves
sent by the transmitter arrive AT the copper arms.
flow down them, and being OF vigorous electricity,
they easily jump from one broken hoop end to the
other Each time the waves jump the gap the cleo
trcal circuit OF the hoop is completed. and the bat
terry Is enabled to cross the break and work
the "sounder." Thus II IL that the short and long
waves allow OF short and long local currents actu-
ating the ''sounder" and producing dots and
"dashes" from which the message Is interpreted.
The waves prevented from going around the
hoop by a "resistance coil" each of the broken
ends This il the whole OF Mr. Marconfs system
that IL expected by experts to revolutionze the sci
OF telegraphy.
The Admiralty much impressed BY the ad-
vanages II offers for an admiral to call and speak
TO any ship OF his fleet without giving visible sign
to the enemy. There liz no cable that be cut
and communication cannot In that customary way
be interrupted. No obstacle can be INTERVIEWED 10
STAY command. and cipher code may be
utilized even II the electrical be tapped by
receiver" in the hands of the enemy, secrecy Is
still maintained.
Ths War Ofice recognizes tho advantages the