Contemporary Advances in Physics, XXV High-Frequency Phenomena in Gases, Second Part

This article on high-frequency phenomena in gases, a continuation of the one which appeared in the preceding number of this Journal, is concerned with the self-sustaining high-frequency discharges. First come the conditions for establishment of the discharge, a spark or corona if the gas-pressure is high, a glow if it is low; then, the laws of the glow-discharge when established in rarefied gas, in tubes with internal or external electrodes. The complexity of the situation is such that fundamental theory is almost powerless as yet, the article thus consisting chiefly of descriptions of data and statements of empirical laws.