The Book of Radio - A Complete, Simple Explanation of Radio Reception and Transmission, Including the Outstanding Features, of Radio Service to the Public by Private and Government Agencies #232047

Probably the best introduction to the radiophone is to spend an hour or so at the instruments listening in on the world. The station we are to Visit is in the library of a little home near New York. The instruments appear to the novice as merely a couple of small boxes with black handles protruding, several switches, a pair of telephone receivers, and a large horn, similar to that which formerly adorned our phonographs.