Ir any doubt had lingered in men's minds as to the practical value of wireless telegraphy, it would have been dispelled by the events of the past few weeks i1 the Mediterranean, and the past few days in China, The lecturer who in the early times of electric telrgraphy told his audience, in order to give them some convincing iden of the manner in which electricity worked, to imagine a dog Lis enough to reach from the capital of France to the capital of Austria, would have to think of something less substantial to-day. " You tread on his tail in Paris," said the lecturer, "and he harks in Vienna." But by the wirelesss m, although the sending insstrument may be taken to represent the tail, and the receiver the head of our imaginary dog, his body is entirely ethenol. Controllable ungulations in this medium had been studied by Tesla, Branly, Ducretet. Righi, Pope, and Lodge before in 1899, Marconi made his epoch: marking experiments between the South Foreland in Kent and the
Text read from the printed page and cleaned; old type leaves the occasional error.