42 



BELL SYSTEM TECHNICAL JOURNAL 



of the possible use of a triple grid of neon tubes, using a triple distrib- 

 utor of the type used in displaying images to a large audience in our 

 initial work in 1027. •* 



Discussion of Results 

 The three-channel apparatus, when all parts are properly function- 

 ing, yields results strictly in agreement with the theory underlying 

 its construction. The 13,500-element image, in resolving power and 



Fig. 4 — Receiving end of three-channel tele\ision apparatus. 



amount of detail handled, is a marked advance over the single-channel 

 4,500-element image. Even so, the experience of running through a 

 collection of motion picture films of all types is disappointing, in that 

 the number of subjects rendered adequately by even this number of 

 image elements is small. "Close-ups" and scenes showing a great 

 deal of action, are reproduced with considerable satisfaction, but 

 scenes containing a number of full length figures, where the nature of 

 the story is such that facial expressions should be watched, are very 

 * Bell System Technical Journal, October, \^11 , pp. 551-652. 



