The Democratic banner. (Mt. Vernon, Ohio) 1898-192?, 1922-08-01
Ohio State University Profess
sor Gives Lecture At The
Chautauqua
ETHER HAS BECOME ONE
CONCERT AUDITORIUM
Radio Fans and Bugs OF M.
Vernon Keenly Interested
In Demonstration

p All over the United States today
). the air is throbbing with the songs of
famous soloists, with instrumental
music played by concert orchestras,
with lectures, sermons, news bulle-
tins, business information, market re-
ports, weather forecasts and political
speeches. The ether has become one
vast auditorium giving selection Of
every variety Of entertainment. And
all that is necessary to make the 81.
lence speak to one is to have one Of
the magic radio receiving sets that are
the sensation Of the age.
Prof. Frederic C. Blake of Ohio
State University discussed the radio
in a popular, entertaining and instruc-
tive way at the Saturday afternoon
session Of the Chautauqua. He had
for an audience one of the largest
crowds that has attended any after
noon session.
In the large audience were good
ly number of radio fans or bugs-and
Mt Vernon has very respectable
number of them. They were eager to
hear and to have the last word in
the new science which in the past
year has seen phenomenal growth.
DR.. Blake brought to Mt. Vernon a
General Electric receiving set that is
the last word in scientific construc-
ton, and the big tent was fitted with
aerial wires. The demonstration CIV
en- proved to be, on the whole more
than commonly satisfactory at this
season of the year. This is the season
!. when the air is full Of static or at
mospheric electricity. More than fire.
queitly it is sufficient to handicap
and even to prevent such demonstra-
tions such as Dr. Blake purposed CIV
ing.
Before demonstrating DR.. Blake
spoke of the advahcements that have
been made in radio telephony. He
told of the experiments made by the
Westinghouse Co. and the Western
Electric Co., that latter subsidiary
Of the Bell Telephone Co., in devel-
oping the radio business until 1t now
is business involving millions and
producing millions.
After dwelling upon the scientific
construction of the radio-telephone,
DR.. Blake explained how wireless
speech Is made possible. Everybody
whose fancy is caught by the magic of
radio, and every purchaser of radio
set, want first to visualize just what
is happening in the sending and re-
ceiving sets to make the miracle OF
wireless speech possible. If one plung.
es stick vertically into a sheet Of
still water, at regular intervals SER
les of small waves will start from
the stick and gradually widen In cir
cles across the water until they d.
minish in size and disappear. The
radio telephone transmits speech by
starting similar waves in the air.
The human voice is produced by VII
brations of the cords of the throat.
These vibrations, varying in freguen.
cy from 1000 to 10000 vibrations q
second, set up sound waves In the air.
Now IL these waves are changed in
to electric vibrations instead Of sound
vibrations, they can be sent broadcast
over great distances in much the
same way that the water waves trav.
eled on the waters surface.
These sound waves are easily con-
verted into electrical waves by small
device called the vacuum tub. This
tube, when the sound vibrations will
be added to the normal vibrations OF
the tube, and the ether or air waves
will vary with the sound vibrations.
Once the sounds have been thus con-
verted into electric waves some meth
cd must be adopted to convert the
electric waves back into sound waves,
80 that the person listening at the
phones will have the words translated
In the sender's own voice. This Is
accomplished by devices almost iden-
tical with those Of the sending station,
except that the instruments are In
reverse order.
First, there is the aerial wire Of an
tenna, connected with which are the
coils used for adjustment. Next, there
is a small instrument called the de-
J tector, which does the actual convert
ing Of the electrical waves into sound
waves. And. finally. comes pair OF
telephone receivers, through which
the listener hears the sounds.
When singer or an orchestra az
the transmitting station sends sound