Evening star., 1927-04-08

awkward process at first. Photo.
graphs were recognizable. but blurred
and not very satisfactory for repro
| duction.
Result of Patient Work.
But the transmission of photographs
by telephone wire contained the basic
idea out of which has come televislon.
The instantaneous flashing of the fea-
lures OF a person at the other end Of
the wire has been the result of patient,
intense experimentation in the labora-
tories of the Bell Co. with all the re-
sources of the great corporation be-
hind the scientific workers.
The picture now is transmitted IN
simultaneously. about 10 times q sec
ond. so that the image appears con-
tinuous.
The principle figure in the develop
ment of television is Dr. Herbert H.
Ives, who has been in charge or the
development work in the Bell laoora-
tories. DIR, Ives has long been a spe-
cialist in the physics OF light ana
color. He was an inventor or note pe-
fore he started on the problem OF
teleViSion-the inventor or an aruHClai
eye for use in photometry, OF q iheth
cd for description OF colors IN pre-
else numerical terms, and or the nrst
practical lamp for the proouclloh oh
artificial daylight. During the war . ne
had charge of three laboratories lor
the development Of airplane photogra-
nhv and his book on that SUBJECT IS
a classic. oe
BESIDES his general supervision Oh
tho television experiments, Dr. ives
was especially responsible 1or lhe Up
ticaI aspects of the problem ana Ior
the nhoro.electric cell. He has recelV-
ed three medals for his work In VaIl-
ms ontical fields from the FRANKLIN
Institute and has been aWardeu hu
merous patents.
Others Active in Development.
Another to whom belongs much OK
tl,a credit is DR.. Frank Gray, VINO ue-
valoned the method of scanning oy
a heam of intense light the object 10
no transmitted, the development oi
sneciaI forms of the neon lamp anu
the aDnIication to television OIL the od-
sic principles of amplifier design.
ME third outstanding figure In the
evnariments is II. NJ. Stoller, VINO mas
Contributed the speed control ana syn
chronizine devices, involving an 4H-
benious combination OF currents a.
low and high frequencies. lie was as
sisted in this work by +. K. Morton.
In the operation of televisloh oquip.
mont the scene is viewed by group
of photo-electric eyes, large photo-
electric cells which scan the scene
nnint bv point as each detail Is lliu'
minated by the sweeps OF nalIo"
beam of powerful light. The cells re-
spond to light by initiating eieciric
currents. and these currents. nl8nly
amnlified and properly conditioned
ore then sent, over the telephone hno
ar in the form of radio waves, TO the
distant receiving station. There the
c1Irrent varies the brightness OF
light. ar of a series of lights, causing
the light to flash before the eyes or
The observer. OF each detail OF the
scene the light and SHADOW is repro
duced for the observer by syncnro-
nized flash of light. These fashes
form a picture, taking the same reia-
tive nositions as the details or the
scene which the photo-electric eyes
observed.
Hoover Predicts Big Future.
Secretary Hoover's talk, which
opened the demonstration, was as fol-
lows:
'It is a matter of just pride to
have a part in this historic occasion.
We have long been familiar with the
electrical transmission of sound. To.
day we have in a sense the transmits