Symmetrical Subdivision of Anode Glow in Helium Discharge Tubes

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Abstract
Symmetrical Luminous Patterns formed on Anode by Electrical Discharge through Helium. Description of Experiment.—When a continuous electrical discharge passes through helium at a pressure of 2 cm., the anode glow may break up into a number of spots more or less regularly distributed. The most striking arrangement is the three ring type with one spot at the center of a regular pentagon, which in turn is surrounded by eleven other spots uniformly distributed about the circumference of the circular anode, which is 2.7 cm. in diameter.

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