AN AUDIBLE AND VISIBLE RAILWAY SIGNAL FOR GRADE CROSSINGS OPERATED BY A HIGH TEN SION CURRENT. WATERWAY IMPROVEMENT ON THE OHIO. Pittsburg district to-daX tates other than railwdy facilities for its handling. Coal Fleets at Pittsburg Ready to Start Down the Ohio River. WATERWAY IMPROVEMENT ON THE OHIO RIVER., scientific american, 1903-08-15

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