But these old ideals of the American pioneer, phrased in the new language of national power, did not meet with the assent of the East. Even in the Middle West a change of deepest import had been in progress during these years of prairie settlement. The agricultural preponderance of the country has passed to the prairies, and manufacturing has developed in the areas once devoted to pioneer farming. In the decade prior to the Civil War, the area of greatest wheat production passed from Ohio and the States to the east, into Illinois, Indiana, and Wisconsin; after 1880, the center of wheat growing moved across the Mississippi; and in 1890 the new settlements produced half the crop of the United States. The corn area shows a similar migration. In 1840 the Southern States produced half the crop, and the Middle West one-fifth; by 1860 the situation was reversed and in 1890 nearly one-half the corn of the Union came from beyond the Mississippi. Thus the settlers of the Old Northwest and their crops have moved together across the Mississippi, and in the regions whence they migrated varied agriculture and manufacture have sprung up. As these movements in population and products have passed across the Middle West, and as the economic life of the eastern border has been intensified, a huge industrial organism has been created in the province,--an organism of tremendous power, activity, and unity. Fundamentally the Middle West is an agricultural area unequaled for its combination of space, variety, productiveness, and freedom from interruption by deserts or mountains. The huge water system of the Great Lakes has become the highway of a mighty commerce. The Sault Ste. Marie Canal, although open but two-thirds of the year, is the channel of a traffic of greater tonnage than that which passes through the Suez Canal, and nearly all this commerce moves almost the whole length of the Great Lakes system; the chief ports being Duluth, Chicago, Detroit, Cleveland, and Buffalo. The transportation facilities of the Great Lakes were revolutionized after 1886, to supply the needs of commerce between the East and the newly developed lands of the Middle West; the tonnage doubled; wooden ships gave way to steel; sailing vessels yielded to steam; and huge docks, derricks, and elevators, triumphs of mechanical skill, were constructed. A competent investigator has lately declared that "there is probably in the world to-day no place at tide water where ship plates can be laid down for a less price than they can be manufactured or purchased at the lake ports."