Abstract :
It is my opinion that Radio, intended as the possibility of transmitting information overlong distance by means of free propagating electromagnetic waves, was a long and dificult parturiton, which began in the spring 1895 with the first experiments of Pontecchio, and ended in 1901, at Signal Hill, St. John\´s, Newfoundland, with the first transatlantic transmission. In fact, if the activity Marconi carried out between 1896 and 1901, hadn\´t been successful, the experiments of the year 1895 would have just opened the way to the invention of Radio, because, as I\´ll say later on, the instruments were not yet syntonic, while ionosphere had not been discovered yet. The latter had a fundamertal role in very-long-distance communications, in particular in intercontinental communications, until the age of communication via satellite. As a consequence, as I said, the words "invention of Radio" does not identify a single event, but rather a whole period, which is described.
