The Salt Lake tribune. [volume] (Salt Lake City, Utah) 1890-current, 1911-10-01
Electrical Show Will Reveal
Many New Wonders of
the Current.
STRANGE INNOVATIONS
Cooking Without Fire and
Lighting Without Wires
to Be Seen.

One of the most novel and interest
ing features of the Electric show
which opens Monday in tine Central
block on West Second South and runs
throughout the entire week, is the &C.
ries Of lectures and experiments by
Professor Plumb
Professor Plumb handles currents of
million cycles per second and at
pressure of thousands Of volts with the
greatest familiarity. and produces
many startling effects bv reaching into
flashes Of artificial lightning and re-
ceiving their full current through his
body.
1t is familiar knowledge with elec-
trical engineers that nigh tension power
transmission circuits sometimes glow
in the dark with faint halo of light
extending out less than an inch from
the wire, caused by the electric dis
charge to the particles of air surround
ing the wire. Professor Plumb in one
of his many experiments employs such
high voltage that these corona effects
surrounding the wires often exceed two
feet IN diameter. producing a very
beautiful discharge, technically known
as high potential gradient
Extraordinary Current.
Current of very high frequency is
used for most of the experiments The
ordinary house lighting current alter
mates back and forth through the
wires sixty times per second, while the
currents used in the lecture swing back
and forth as much as n million times
IN one second. These currents are pro.
duced by a device known as Tesla
oscillator. consisting essentially of a
resonant circuit or electrical pendulum
carefully tuned to vibrate many thou
sand times per second.
The -ligh frequency generator used
by Professor Plumb is unique in de
sign and has sufficient power 10 trans
nit wireless messages from this coun-
try TO Europe.
Other exhibits will be wireless eIec-
trio lamps which will light in any part
Of the room and will brilliantly glow
with beautiful colors; displays of ex-
pcrimental iichtning' and thunder and
other interesting phenomena
Although pressure of 800 volts is
sufficient TO kill and dangerous shock
is sometimes caused by less, Professor
Plumb places himself IL series with
pressure many times greater and per
mlts current of several amperes to
pass through his body, after which it
lights large number of Incandescent
lamps and melts iron wires. This he is
able to do owing TO the peculiar proper
ties OF high frequency currents.
Lamp That Talks.
Another interesting feature IF the
show will be the reproduction of the
celebrated talking arc lamp. as arranged
by Professor Simon, the eminent Ger.
man scientist. Professor Knowlton of
the instructing staff of the University
OF Utah has reproduced this expert
ment and the performances of this arc
lamp are truly wonderful. The voice
Of person talking into telephone
receiver al some distant point and en-
tIrely out cf the hearing of the audit.
ors Is reproduced faithfully by the arc
lamp and the words appear to bc conf
ing-and really do come--from the
flames OF fire emitted by the are lamp
Tbirty-two wears ago. when Edison
first produced his tiny incandescent
electric lamp he had wonderful visions
of the future and predicted that the
use Of his new invention would ulti-
mately become universal 1t NAV he
doubted il he realized that his predic-
ton would come true as soon as it has
The rarid development of the electrical
industry, however, has practically full
filled his dream within the lifetime OF
that wonderful Inventor. Not onlv has
tho use of electric light become univer.
sal, bat its use has been extended to
MANY new fields. outside Of lighting.
The electric firelcss eookcr-oue of
the latest Developments OF the science