Again, the dependence of the South upon the North, for its provisions, may be inferred from such additional facts as these: The "Abstract of the Census," for 1850, shows, that the production of wheat, in Florida, Alabama, Mississippi, Louisiana, Arkansas, and Texas, averaged, the year preceding, very little more than a peck, (it was 27/100 of a bushel,) to each person within their limits. These States must purchase flour largely, but to what amount we can not determine. The shipments of provisions from Cincinnati to New Orleans and other down river ports, show that large supplies leave that city for the South; but what proportion of them is taken for consumption by the planters, must be left, at present, to conjecture. These shipments, as to a few of the prominent articles, for the four years ending August 31, 1854, averaged annually the following amounts: Wheat flour brls. 385,204 Pork and Bacon lbs. 43,689,000 Whisky gals. 8,115,360 Cincinnati also exports eastward, by canal, river and railroad, large amounts of these productions. The towns and cities westward send more of their products to the South, as their distance increases the cost of transportation to the East. But, in the absence of full statistics, it is not necessary to make additional statements. From this view of the subject, it appears that slavery is not a self-sustaining system, independently remunerative; but that it attains its importance to the nation and to the world, by standing as an agency, intermediate, between the grain-growing States and our foreign commerce. As the distillers of the West transformed the surplus grain into whisky, that it might bear transport, so slavery takes the products of the North, and metamorphoses them into cotton, that they may bear export. It seems, indeed, when the whole of the facts brought to view are considered, that American slavery, though of little force unaided, yet properly sustained, is the great central power, or energizing influence, not only of nearly all the industrial interests of our own country, but also of those of Great Britain and much of the Continent; and that, if stricken from existence, the whole of these interests, with the advancing civilization of the age, would receive a shock that must retard their progress for years to come.