A further development of the practical appliance of wireless telegraphy
was demonstrated before the German Emperor in Berlin last Saturday. By the improvements introduced by Professor Slaby and his assistant, Count Arco, it is now possible for an operator to communicate simultaneously with several different stations. Thus on Saturday Professor Slaby conversed from a room in Berlin with two stations, one at Charlottenburg, and another at Ober :Schonweide, distant two and eight miles respectively. The conversations were carried on by the Morse code, the two instruments used being connected with a lightning conductor in the neighbourhood, and though one of the stations was separated from the room by the greater part of Berlin, the interference of the intervening buildings, chimneys, &c., was successfully neutralised by a special apparatus. The value of wireless telegraphy for signalling purposes is now conclusively
established. Unless, however, the speed of transmission is greatly enhanced, there is little prospect of Signor Marconi or Professor Slaby delivering our streets from their wire entanglements.
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