Oscillations in the Glow Discharge in Argon

Report is made of radio frequency oscillations observed in argon glow discharges. The frequencies lie in the range of ${10}^4$ cycles/sec to ${10}^5$ cycles/sec in approximate harmonic relations. They are very sensitive to pressure changes but appear to bear no relation to the tube current. The peculiar action of a magnetic field on the oscillations is described. Some frequency calculations are made on the assumption that the potential distribution throughout the Faraday dark space can be represented by a parabola.