The State of Michigan is the greatest lumber-growing region in the world, not only on account of its interminable forests of the choicest pine, but in the remarkable facilities for getting it to market. With a lake coast, on the lower peninsula alone, of over one thousand miles--with numberless watercourses debouching at convenient distances into her vast inland seas--she enjoys advantages which mighty empires might envy. Her white-winged carriers are sent to almost every point of the compass with the product of her forests, which, wherever it may go, is the sign of improvement and progress, while by the large expenditures involved in the manufacture, and the employment of thousands of hardy laborers, the general prosperity is materially enhanced, and a market opened within her own borders for a considerable share of the surplus production of her own soil. The annual product of the pineries alone amount to the sum of _ten and a half millions of dollars_. The lumbering, mining, and fishing interest combine to furnish by far the best home market in the Union, and one which in seasons when a large surplus is not compelled to seek a market, can boast its independence of the "bulls" and "bears" of the great commercial metropolis. The dense forests in the interior of the State have not yet been reached, and when the contemplated roads are made, a field will be presented for the investment of capital of a most remunerative character. The government has already taken such steps as will soon make Mackinaw the centre of a great railroad system. We need only refer to the actual facts in order to make this clear. Congress, by an act passed in 1855-6, granted to the State of Michigan a large body of land for railroad purposes, designating four routes. 1. From Little Noquet Bay to Marquette, in the Superior country. 2. From Amboy, on the State-line of Ohio, through Lansing to or near Mackinaw. 3. From Grand Rapids to Mackinaw. 4. From Grand Haven to Port Huron. It will be seen that this plan is formed on the basis of a direct line from Lake Superior through the mineral regions to Lake Michigan. The law fortunately permitted the last two companies to make their lines at or _near_ Traverse Bay, and as Mackinaw is but comparatively a short distance, both companies have wisely concluded to terminate their lines at Mackinaw. It is at once evident that the Michigan line, centering at Mackinaw, must be met _there_, by railroads penetrating various sections of the northern peninsula. This is evident, and we understand is already foreseen, and measures will be adopted to accomplish that end. In the mean time, let us examine the prospects and influence of the two long lines of Michigan railway terminating at Mackinaw. The whole amount of land granted to the Michigan railways is estimated to be about 3,880,000 acres. From this, however, there will be some deduction in consequence of lands already selected, and which