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Show l!iis Pipe Was S' This illustration is from a photograph of a section cut rorri a ! Ili length of 12-inch O. D. Lap-Welded Wrought Pipe. ' : S; , J This length of pipe was in use in a Water-Works System in : lujj Utah for twenty-two years, and was kalameined and asphalted. : C It will be noted that some of the asphalt remains on the pipe and is ' f : almost as smooth as on the day the pipe was shippeddrom the mill II Q During the entire twenty-two years of service, this main was Ji within a short distance of an electric street car line, and shows " Ji no evidence of electrolysis. h . J : q MATHESON PATENT LOCK JOINT PIPE is the ideal pipe ' ; 11 . j for Mining, Water-Works, Irrigation Systems, Hydro-Electric R t Plants or for any similar purposes. V- We will be glad to supply full information on request. IB i;.. National Tube Company -j. Jl ' General Sales Offices, Frick Bldg., Pittsburgh, Pa. . 7 -'' To save time and delay in correspondence address: . , V- - NATIONAL TUBE CO., Majestic Bldg., Denver, Colo, B |