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Radio Record, Volume VII, Issue 4, 4 August 1933, Unnumbered Page

HE wave-length of the new shoftwave station at Radio Excelsior (situated fifteen miles from Buenos Aires) is to be 30 metres, ™ * a N February, the New York Electrical Society arrapiged and Dr. W. F. G. Swann carried out, a broadcast which ought to appeal} to astronomers. Some of the little-known "cosmic rays" were trapped after they had penetrated a 360-tons steel vault 40 feet underpeath a 386*storey building! The rays were caused to ionise the air particles apd generate a minute electric cyrrent, which was then amplifiéd and byagdcast over a network of seventy radio stations, The noise was somewhat romantically described ag the birth cries of atoms born in interstellar spaces probably a million ‘years ago.