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Show THE CITIZEN 6 A Mia o 0 f) T' i) The Distant Scene Is Viewed by Looking Into the Opening Indicated by the Arrow. TC'NGINEERS of Bell Telephone Laboratories, who nearly two -- years ago the first demonstration of television, disclosed some of the further progress which they have made during their continued researches by demonstrating a new transmitting device which is capable of putting upon the television circuit outdoor scenes. On the roof of the laboratories actors boxed and danced, swung baseball bats and golf clubs to appear in brightly illuminated pictures in one of the laboratories on the eighth floor. The present apparatus differs radically from that of the first demonstration when the scene to be transmitted was illuminated by a powerful artificial light and only the actors head and shoulders appeared in transmission.1 With the improved apparatus the scene was illuminated by ordinary sunlight and covered the area occupied by the golfer. ' In the first form of apparatus, demonstrated in April, 1927, the scene was illuminated by a rapidly ' oscillating beam from a powerful arc light, and that limited the scene to be transmitted to a very small area. The new development frees television from one of its most serious limitations. Light passing through the lens and event to be THE sceneis orreduced to the form of an image by a large lens, this image being scanned by a rapidly rotating disc similar to but much larg-- ; er than that previously employed. The lens served somewhat the same The developments in television which were demonstrated were perfected by Dr. Frank Gray of the Laboratories working in collaboration with Dr. Herbert E. Ives. They illustrate tlie continued interest and progress of the telephone engineers in the problems of television, but the engineers themselves refused to prophesy as to future developments or applications. They pointed out that the improvement was in the television transmitter and that its use required no fundamental change in the two types, of receiving equipment for use by either single individuals or larger audiences which were developed and demonstrated a year purpose in the television apparatus as the large lens of an astronomical telescope, and like the latter it should' be large to gather as much light as possible. The experiments show that moving persons and objects can be suc cess fully scanned, although at a considerable distance from the lens, and therefore in such a position that the focus of the lens does not require changing from moment to moment scanning disc actuates a light responsive device of extreme sensitiveness and generates an electric current which after amplification may be transmitted either by wire or radio. as- - ity |