The Minnesota mine, fifteen miles from Ontonagon, during the year ending January 1, 1857, produced 3,718,403 pounds of copper. The Cliff mine during the year, produced 3,291,229 pounds of copper. The Portage Lake District, including Isle Royale, Portage, Huron, Quincy and Pewabic shipped 539 tons of copper in 1857. The Lake Superior miners estimate the total shipment of copper mineral from the lake during the year 1858, at 6,008 tons, of an average purity of 67 per cent--making the product of ingot copper about 4,000 tons, worth in the market at present $1,840,000. Estimating the population of the copper region at 6,500 persons, this gives an annual product of about $280 for each man, woman and child. The shipments were as follows: From Keweenaw Point 2,180 tons; from Portage Lake 1,152 tons; from Ontonagon District 2,676 tons; total 6,008 tons. The extent and importance of the copper mines of Superior, in relation to the general trade in that metal, may be estimated by the following account of the amount of pure copper produced in other parts of the world. The United Kingdom of Great Britain 14,465 tons, Norway 7,200 tons, Russia 4,000, Mexico 500, Hesse Cassel 500, Hartz Mountains 212; Sweden 2,000, Hungary 2,000, East Germany 443; making a total, out of America, of 30,820 tons. The single District of Ontonagon can produce as much copper as the entire Kingdom of Great Britain. The copper mines of the United States, are doing their part as effectually in adding to the solid wealth of the country, as the gold mines of California, or the silver mines of the Arizonia. The copper mining countries are another illustration of the principle upon which success is based, namely, that concentrated talent, effort and capital are necessary to a development of the resources of a country. When we look into the manufacture of this article, we shall find a new element in the future growth of towns to arise in this region. At present, a large portion of this copper is shipped abroad to be smelted. But is there not every reason, as well of economy as of material, for carrying on smelting, and all other manufacturing processes, at the point of production? The cost of transporting the raw material is greater than that of carrying the manufactured product. But when all the elements of successful manufacturing exist where the raw material is found, then the economy of the process is doubled. Of metals, of navigation, of food, we have shown there is an inexhaustible supply. But there is also coal near enough to supply the last and only material which might be supposed wanting. Coal is found in the Southern Peninsula of Michigan, in abundance and of good quality. This coal is found at Jackson and at Lansing. This was a matter of so much importance that Prof. Douglas, of the State University, proceeded immediately to analyze it. The following are the principal results of his analysis. It was made chiefly in reference to the manufacture of gas:--