Perhaps you are tired of hearing about radio. For a year or two the newspapers have been full of it; magazines have run story after story about it; new books and new periodicals have been Spreading the superstitions (and occasionally the gospel) of radio. Possessing not only inherent merit but also a lively appeal to the imagination, radio has grown riotously. The tremendous fas cination of stretching out one's personal contacts far enough to intercept wireless messages arriving, over continents and high seas, from points hun dreds or even thousands of miles distant, has at tracted millions of people all about the world to the study of radio.