Or ninety thousand miles of lakes and rivers, extending half across the continent. The following table shows the amount of tonnage belonging to different cities in 1857:-- Tons. Tons. New York, 1,377,424 Charleston, 56,430 Boston, 447,966 Detroit, 57,707 Bath, 189,932 New Bedford, 152,799 Baltimore, 191,618 New Orleans, 173,167 Providence, 15,152 Cleveland, 63,361 Philadelphia, 211,380 Chicago, 67,316 Buffalo, 100,226 Milwaukie, 22,339 This shows that Chicago had in 1857, being then twenty-five years old, a larger tonnage than Charleston, the capital of the Palmetto Kingdom; and Milwaukie, still younger than Chicago, owned a larger amount of tonnage than the old and wealthy city of Providence. In 1857, the export of grain from the Lake ports was sixty-five million bushels; in 1860, it was estimated at one hundred millions. The coal-trade of Cleveland, in 1858, was 129,000 tons. A large amount was also shipped from Erie. In 1858, the salt-trade of the Lakes amounted to more than six hundred thousand barrels, most of which was shipped from the port of Oswego on Lake Ontario. The lumber received at Chicago in 1858 amounted to: Boards, 273,000,000 feet; shingles, 254,000,000; lath, 45,000,000: worth $2,442,500. The present navigable outlets to this great commerce are three in number. First, the Erie Canal, from Buffalo to Albany, which, in its enlarged form, takes probably two-thirds of the productions of the Lake regions. Second, the River St. Lawrence, which, by means of the Welland Canal, secures a good share of the trade. Third, the Illinois and Michigan Canal, which conveys large quantities of lumber, salt, and other heavy goods to the Illinois River and the Mississippi. Of course, more or less produce is taken to the seaboard by the railroads; but, even if they could compete in price with water-carriage, it is evident that they are incapable of moving the surplus grain of the Northwest, as it now is. Another great navigable outlet to the Lakes is needed, so that vessels of the largest class may sail from the elevators of Chicago to the Liverpool docks without breaking bulk; and in reference to this, a survey has recently been made by Thomas C. Clarke, under the direction of the Canadian Government, for a ship-navigation between Montreal and Lake Huron, by way of the Ottawa River, Lake Nipissing, and French River. The Report shows that the cost of the work for vessels of one thousand tons burden would be twelve million dollars,--and that it would cut off a distance nearly equal to the whole length of Lakes Erie and Ontario, thus saving from three hundred and fifty to four hundred miles of navigation. In view of the fact that the navigation of St. Clair and Erie is the most troublesome and dangerous part of the voyage, this plan certainly deserves attention.