One Thousand Ways to Make Money by Page Fox

361. FORTUNES IN COPPER.--Forty-eight per cent. of the copper of the

world is in the United States and Canada. The price is $200 a ton. Almost all the mines of the Lake Michigan region are making profit, but the industry is yet in its infancy. When it is known that a mine has been made to pay which contains less than one per cent. of copper, it can be seen what fortunes are in the mines that pay from forty to fifty per cent., and there are some that pay even more.