ABSTRACT
IT was realised almost from the first that a system of television in which either a rotating disc or drum, or a system of vibrating mirrors, or in fact any moving parts that would need constant attention was used, would not be quickly adopted by the average non-mechanically minded man. Therefore a non-mechanical television system was the aim of every inventor. The major problem, that of the receiver, was solved by the adoption of the cathode-ray tube, which made it possible to put into the hands of the public a television set that could be handled by anyone who could operate a modern radio receiver.
