Refraction of short radio waves in the upper atmosphere

A. E. Kennellys The paper is very timely and interesting because so much attention has been drawn in recent months, not to say years, to the marvelous properties of very short waves. The paper makes a definite and very reasonable attempt to explain some of those properties. The direct wave dies out at a relatively short distance from the sending station and then nothing more is heard of it or received from it until it has traveled a relatively great distance. That phenomenon repeats itself at least once.