It is a well known historical fact that the extraction of metals and minerals from the earth has been more subject to monopoly than almost any other business. It was, and in a large part of the civilized world still is, esteemed a prerogative of the sovereign. Agricultural products have always been gathered from a wide area; manufactures were formerly the product of mean and scattered workshops; but in the working of a rich mine, there was a constant income more princely than was to be obtained from any other single source. Again, with all due respect to the traditions of former generations, it seems to have been thought that any thing to which no one else had a valid title belonged to the crown; and as no one was able to assert any stronger claim to the ownership of mineral wealth than that they had stumbled upon it, it was natural for the sovereign to claim it as his. We see thus the recognition at an early date of the inherent difference between natural wealth and that created by labor. But coming down to the present time, it is evident that the business of extracting some of the rarer metals from the earth is peculiarly liable to become a monopoly. It is one of the new laws of trade, whose force and importance we are just finding out, that the ease of restricting competition varies with the number of competing units which must be combined. Our most valuable metal, iron, is so widely distributed that any attempt to control the whole available supply could not long be successful. But it is one of the peculiarities of modern industry that by its specialization it furnishes constant opportunities for the establishment of new forms of monopoly, whose power is not generally understood. In the manufacture of Bessemer steel, which has now largely displaced wrought iron in the arts, it is necessary to use an iron ore of peculiar chemical composition. This ore is found most abundantly and of best quality in the mines of the Vermilion range, lying about one hundred miles north of Duluth, Minn., and in the mines of the Marquette Gogebic, and Menominee regions in the north Michigan peninsula. According to good authorities, a combination more or less effective has been formed among the owners of all these mines; and the highest price is charged for the ore which can be obtained without driving the customer to more distant markets for his supply. Among the mines of this district, competition, if not entirely stopped, is greatly checked, and is likely soon to be entirely a thing of the past. It is an interesting fact that among the members of the syndicate which owns the principal mines in the Vermilion regions are some of the trustees of the Standard Oil Trust. It is stated that some of these mines have paid 90 per cent. per annum on their capital stock, which, it is to be noted, represents a much greater sum than the amount invested in the plant of the mine.