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Show Concrete Pole Invented, Herno, Switzerland. A Bwlss engineer, en-gineer, M. Hans Slegwart, has Invent-cd Invent-cd a new telegraph polo which Is mado of concrete Instead of wood or iron, as at present usod. A spcclnl machine Is employed to form long, hollow concroto rods, which withstand tlmo and woathor In such ji mnnnor as to render them moro than twice as economical ns wood or Iron poles. The polos will probably bo largely used for electric tramways and overhead over-head tolophone lines. |