From a long article on this subject in the Lynchburg Weekly Virginian we glean the following valuable information, which tends more and more to show that the mineral wealth of our country is greater than any other in the world :—From what has already been discovered, it has been calculated that there is enough coal in this section of the country to supply the whole Mississippi valley with fuel for a thousand years, and fresh discoveries are being made in the Kanawha valley every day. All the coal yet discovered there is of a superior quality, both bituminous and cannel, and when the navigation is made more easy, and capital has turned its attention to that quarter, we have no doubt that coal from this region will find its way to every city in the Union, for it has already made its appearance in the Cincinnati market.