Evening star., 1925-10-10

A few days ago there was much
ado over the taking of a photograph
at Camp Leavenworth, kans., de
veloping it. and within 29lr minutes
delivering it in New York City.
About the same time Macmillan
spoke from near the North Pole and
his voice was heard in Australia. No
body knows whether the voice tray
eled around the world via the east or
by the west. The distance was half
around the world, either way. Such
vtjce carrying has grown so common
placs that it is taken as matter of
course.
There is broadcasting apparatus
which, without the use of any vtele-
graph wire, takes d picture and broad
casts it upon the ether just as the
voice is broadcast, and million or
any number Of receiving sets all over
the world could pick up that pic
ture instantaneously.
Within the next few months. ac.
ccrding to the jfNentor, Charles Fran
cis Jenkins OF Washington, the re-
ceivins sets for such pictures will he
put upon the market at cost not ex-
ceeding $S5.,. In every home where
there is "a laman or womaH of vision
there may he screen upon which the
whole world will vfsibly pass in
review. r.
Apart from the wireless transmits
sion of photography is what the in
ventor. Mr.. Jenkins canst, .,radiovi-
sion." by which, without the taking
Of photograph, the actual view OF
any scene within the range OF the
lens will be broadcast and may be
picked up instantly and stimuli.
taneously upon millions of household
scfeens scattered throughout the
world. In an airplane soaring above
battlefield in China or Europe there
will be an observer with such a trans
mittee, viewing the maneuVers of bat
tie. In Washington, in Toxic, in Lon
don, Rome, Paris and Buenos Aires
there will be war boards watching the
motion picture of that battle so long as
the observer remains in the air. Fleet
movements similarly spied from the
sky will be visible around the world.
Radio vision is to sight what radio
is to hearing; distance exists no more.
" &sx
With the radio, supplemented with
"radiovision,' the traveller will carry
his camera and bkoadtasting appa-
ratus with him in his wanderings and
will talk into the ether, as he goes,
while his audience at the antipodes
VIII llSteH III dllu pcSP III. ilenlhAS d2fi
seeing instantly all that he hears and
sees. The home body may thus.crhss
the Himalayas or the Sahara or go
down to the sea in ships while seat
ed comfortably. before his cozy fire
side. The "shut.in' will soar on the
wings Of the eagle. bear and see the
hillows of the ocean and the, storm in
the mountains beyond the seas.
The deaf mute may talk &ffh his
expressive sign language. while thou
sands CT other deaf mutes will see. and
read his message upon their home
screens. The processes Of nature and
the customs Of distant society may, he
studied in the classroom. All the
world will be cosmopolitan.
This is not an inventors dream. 1t
is a demonstrated accomplishment Of
the man who invented the first motion
picture projector-the same apparatus
which after 80 years use all over the
world has never been superseded. Mr..
Jenkins prizes highly his gold med
and the John Scott gold medal-both
from the. Franklin Institute of Phila.
delphia, in testimony Of the value OF
his motion picture inventions. Hence,
what he says of future developments
in optics Is not mere fancy.
The principle of motion pictures lies
in the fact that the human eye cannot
distinguish as separate pictures more
rapidly than Is pictures per second.
When a motion picture lis made not
less than rs times q second the camera
shutter opens and closes. each open
Ing registering n distinct negative.
When reproduced on the screen these