evision: - Early Television Foundation

22 TELEVISION: THE REVOLUTION
the room are subdued. With a large television
receiver, two dozen people can watch a program
in comfort.
The sound of Miss Grable's voice, to accompany
the picture,
is broadcast over another radio
transmitter, and is received through a separate
radio contained in the same cabinet. The soundchannel
of television operates on FM, a very
clear, life-like method of sound-broadcasting.
Given proper care, the television receiver
will last almost indefinitely. The kinescope
screen will.last for hundreds of hours,
if it's not
turned up too brightly. However, a carelessly
violent bombardment from the cathode beam
may cause the screen to burn out. But special
screens .have been constructed for theatre television,
which glow
with the brilliance of an
electric arc. This very bright image is
projected
on a theatre screen, exactly as are motion pictures.
Thus, television can be seen by a whole
theatreful of people.
Naturally an invention as complicated as
television didn't spring into being overnight.
The idea of sending pictures by radio is as old
as sound broadcasting. A German scientist
named Nipkow first devised a system for tele-