Sir Joseph J. Thomson, headmaster of Trinity College, Cambridge, discoverer of the electron, and considered by many the greatest living physicist, is in the United States on an extended visit as the guest of Franklin Institute, Philadelphia. As guest of the Western Electric Company at luncheon in the Bell System laboratories, Sir Joseph saw in operation many applications of his fundamental theories and inventions. Among these was a water-cooled copper vacuum tube, devised by W. G. Housekeeper, with 40 times the capacity of the present glass-enclosed tube used in long-distance radio....
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