National Iron Company MACHINE WORK .. On MINING, CONTRACT- ING, DREDGING, TRANSMISSION, ROAD- BUILDING and all other types of machinery. FABRICATING STRUCTURAL STEEL .. For BUILDINGS, BRIDGES and all other pur- poses. FOUNDERS . . GRAY IRON and SEMI-STEEL CASTINGS. FORGING .. BILLETS, BARS and miscellaneous. WELDING ELECTRIC WELDING of. all kinds. ENGINEERING . . DESIGNING, DRAFTING, ESTIMATING. DULUTH, MINNESOTA STERLING HIGH GRADE OLD RANGE LIMONITE IRON ORES PITTSBURGH COKE & IRON COMPANY MINES AT IRON RIVER, MICH. GENERAL OFFICES 1905 GRANT BLDG. PITTSBURGH 19, PENNA. Telephone--Atlantic 2290 125