From the July 18, 1936, issue

MODEL INDICATES COSMIC RAY PATH ABOUT THE EARTH

To explain the magnificent spectacle of the aurora borealis it was long ago suggested that our planet continually receives a bombardment of high-speed electrically charged particles. At that time, however, no other evidence for such electrical showers existed.

When that subtle influence, called cosmic radiation, was discovered and found to consist, in part anyway, of fast-flying electrical particles, this explanation of the aurora was verified.