Text: When an electric discharge takes palce between the anode and a perforated cathode in a vacuum tube, fine pencils of light are seen to pass through the perforations in the cathode. These rays are called canal rays and consist of positively charged particles. They produce phosphorescence on the wall of the tube. Canal rays travel at a lesser velocity and in the opposite direction to the cathode rays. This fact and also the fact that the rays are deflected by poerful electric or magnetic fields in the opposite direction to cathode rays, is taken as proof that they consist of positively charged particles. 190 Discovered in 1886, the flow of positive ions from anode to cathode in an evacuated tube. Same as EDISON EFFECT (qv).

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Source: 190