The vast Hull-Rust mine, the greatest of the Mesaba deposits, is perhaps the largest single body of ore in the world. Its exact extent is not known. Only recently it was discovered that the ore body led under the town of Hibbing, a fair-sized municipality, whereupon it was decided to move the town to get at the ore. So in the summer of 1920 houses and other buildings forming the town were lifted bodily from their foundations and moved to a new location near by. This enormous undertaking seemed to be considered quite part of the day’s work by officials of the Oliver Iron Mining Co., which subsidiary has charge of the Corporation’s ore operations. An official of that company, questioned about the expense of moving the town, said: “Oh, it will cost a million or more, but there’s at least $40,000,000 in ore under the old site.” Ores obtained from the Mesaba and other Lake ranges usually average slightly more than 50 per cent. in iron. There is an enormous amount of ore in this region, however, which runs less than 40 per cent. in metallic content, and further, is too rich in silicon, which factors make it unavailable for steel making without previous treatment, but this ore is too valuable and too much needed to be allowed to go to waste. The Corporation solved the problem by erecting at Coleraine a “concentrator,” which is really nothing but a great washing plant for ore, and by this means crude ore containing 37 per cent. or thereabout, in iron, after treatment in which water and gravity are the principal factors, is brought up to an average of about 56 per cent. metal. In one day this concentrator has treated 50,000 tons of crude ore, producing 32,000 tons of concentrates. Let us leave the mining regions and follow the ore on its journey to the furnaces. The journey is begun in either of the two railroad systems owned by the Corporation, and radiating over the ranges--the Duluth, Missabe & Northern, at the head of which is William A. McGonagle, which serves the Mesaba range principally, and the Duluth & Iron Range, of which F. E. House is president, which serves the Vermilion section. We shall soon arrive at Duluth, or near-by Two Harbors, where these roads terminate. Here the ore trains run out on the huge Corporation docks, some of which project half a mile into the lake, and dump their cargo into enormous pockets in these docks. This ends the first stage of the journey. But our travels have hardly begun. The next stage of the journey is made by boat. The Corporation, through the Pittsburgh Steamship Co., owns no less than seventy-eight large steamers, many of them capable of carrying 12,000 tons of cargo, and all built specially for ore transportation. To and fro between Duluth and Two Harbors on Lake Superior, and Gary, Chicago, Cleveland, Ashtabula, Conneaut, Fairport, and other points in the lower Lake, this great fleet goes constantly except when winter freezes up transportation.