Fifty years ago, 43 people lost their lives in the Moorgate Tube crash. Mike Lewis was at the station that morning, and vividly remembers the scenes on one of the Underground‘s blackest days. Or ...

Abstract: A modification of the silicon diode array camera tube has been carried out which permits X-ray images to be displayed on a television monitor. The silicon target, 50 to 150 μm thick, serves ...

The tube and associated control circuits are described. Apparatus for heating dinners and plastics has been constructed using this tube. Experimental magnetrons give 30 kw at 1,000 megacycles.