Vacuum Apparatus
Repulsion Tube
Vertical tube with two parallel wire cathodes at two ends of the tube with the third electrode to serve as the anode.
PH95067
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Vacuum Apparatus
Canal Ray Tube
To show positive rays. Vertical type, with two fused discs at each end and a perforated cathode in the center through which canal rays pass. The space below the cathode is filled with characteristic glow of cathode rays and the upper portion has canal rays. A magnet brought near the upper portion will repulse the rays, showing the positive nature of the canal rays.
PH95040
