The evening world., 1922-05-15
Bu Can't. Robt. Soofeld Wood.

o. r. c., M. c., croIx de ousrre with
four palms; formerly Commander 167th
Squadron, Royal Air Forces.
e. W. r. c. TO SHOW v. T. MYs-
TERIEs.
Under the auspices of The Evening
World Radio Club. the American Tele-
phone and Telegraph Company's NOV
ing pictures CT radio will be shown to
the public for the nrst time In New
York City during the week OF May "
at the Radio Show In the list Regiment
Armory. These pictures, which tell the
story OF radio so wildly, will be shown
twice daily, once in the afternoon and
again during the evening.
Aside from the popular indoor sport
of trying to estimate the number OF
radio sets scattered over the country,
which incidentally Is nearing the million
and half mark, there are some 5,OOO,-
900 persons, more or less. who are In
terested In learning the why's and where-
fores Of the theory behind radio ope.-
ations. This Is not a task to be entered
into lightly after a heavy meal, as any
one knows who has tried II. The sad
and unalterable truth Is that electric
current Is not visible to the eye. In
fact, It does not directly AFFECT any N
the senses, and so, In spite or the fact
that the faith OF US average persons Is
quite equal to all the vicissitudes OF our
fayorite stock, on the curb or big
board" we find It difficult to take al
of the alleged pranks of the electric
current on faith and to follow explana-
tions which deal with a thing OF which
we have absolutely no actual acquaint-
ance.
II only some means could be devised
viai-
BILE. the way of the radio expounder
would Immediately become as straight
and broad as Sir Arthur Conan Doyle's
road to heaven.
This brings to light a serious over
sight on the part Of nature. Since the
very short electrical waves known as
light are visible. why shouldn't all wave
langths have been made visible? This
would include the electric current In all
its forms, because, OF course, when
current flows in a wire 1t simply means
thaA ordinary electric waves are travel
ling along the outside of that wire and
should therefore be visable. But there
ia cause for hope, for II may very likely
ne. IL the widespread interest In radio
continues, the next stage In evolution
will bring this desired extension OF the
sense of sight.
But while waiting for evolution to run
its course 1t may be well to adopt other
means. And now some motion pictures
come along in which this very thing has
been attempted, and indeed In large
measure accomplished. With the help
of motion pictures the engineers OF the
Bell telephone system consulted their
imaginations, their text books and their
technical reports and have produced
movie which will give the layman a
very concrete notion as to how the radio
telepnone operates. Any one who wants
to be let into the secrets OF the family
life of the ''electron" and the ion
will find II to his profit to attend this
first appearance of the very latest ot
film stars, As everybody knows, the
electron Is the smallest thing so far dis
covered by physicists, but they have
hopes of straining our imaginations still
further by sometime discovering some-
thing many times smaller. However, to
the causual observer there would seem
to be a grave danger In this undertake
ing, as there may not be space enough
behind the decimal point to express its
size after II Is found.
Considering the size OF the electron
II has been calculated that 1t Is the
highest paid star in the movie firma.
ment. This will be obvious wien we re-
member that 1t consists OF negative
thousandth as much as an atom OF hy-
drogen. Or II each electron in a drop Of
water were as big as the drop the
original drop would then fill the en-
tire basin of the Great Lakes. inciden-
TALLY leaving enough over to quench
New York City's Volstead thirst for
the next 10000 years and then some
maybe.
The electron Is introduced In the film
rf nil xto
in the action Of the vacuum tube which
is largely responsible for the present
popular development of radio tele-
phony.
The vacuum tube has but recently
emerged from the physicist'J laboratory
and consequently any one who is de-
sirous of understanding its operation
will find 1t desirable to cultivate the
social acquaintance of many things
which heretofore he has blissfully ig-
nored The film is designed to eluci-
date the amplifying, detecting and mod
ulating properties of the vacuum tube
Some fundamental Information in re-
gard to waves Is also included In the
movie. Not all waves are alike, and
in particular Mayor Hylan will be re-
leved to know that the film has moth
ing to do with crime waves. Ii does,
however, treat of water waves, air
waves ana electric waves ana II DIlnBs
out clearly the manner In which cleo
trio waves are used to carry and re-
produce the sounds of the voice and
other air vibrations such as music. 1t
also shows how the electrical waves
are shaken loose from the antenna OF a
transmitting station, how they spread
out i'm space and how they excite an
electric current in receiving antenns
as they pass by 1t.
II you want to get good grip on
the fundamentals OF radio in the short
est time lInag ginable, see these intensely
interesting pictures. The knowledge
which these pictures impart could not
be obtained by another method by
months of reading and study. So
cleYarly and consummately have they
been arranged that the little tots are
able to understand and enjoy them.
There is also liberal education for the
adept fan and engineer. They are an
educational feature that no one can af-
ford 10 miss who Is interested In radio.
INVITATION TO RADIO CLUB MEM.
9ERs.
The management OF the New York
Radio Show, which opens next Monday.
Nav 22 at the list Regiment ArmOry,