If as well cultivated as England, our country could much more than feed and clothe the whole population of the world. If as densely settled as England, our population would be more than twelve hundred millions, exceeding that of all the earth. If as densely settled as Massachusetts (among the least fertile of all our States), we would number 513,000,000 inhabitants. We have seen that our area exceeds that of Europe, with a far more genial sun and fertile soil, and capable of yielding more than double the amount of agricultural products and of sustaining more than twice the number of inhabitants. We have a greater extent of mines than all Europe, especially of coal, iron, gold, silver, and quicksilver. Our coal alone, as stated by Sir William Armstrong (the highest British authority), is 32 times as great as that of the United Kingdom, and our iron will bear a similar proportion. Our maritime front is 5,120 miles; but our whole coast line, including bays, sounds, and rivers, up to the head of tide water, is 33,663 miles. (Ex. Doc. No. 7, pp. 75, 76, Official Report of Professor A. D. Bache, Superintendent of U. S. Coast Survey, Dec. 5th, 1848.) Our own lake shore line is 3,620 miles. (Top. Rep. ib. 77.) The shore line of the Mississippi river above tide water and its tributaries, is 35,644 (ib. 77); and of all our other rivers, above tide water, is 49,857 miles, making in all 122,784 miles. Of this stupendous water mileage, more than one half is navigable by steam, employing an interior steam tonnage exceeding that of all the internal steam tonnage of the rest of the world. No country is arterialized by such a vast system of navigable streams, to have constructed which as canals of equal capacity would have cost more than ten billions of dollars, and then these canals would have been subjected to large tolls, the cost of their annual repairs would have been enormous, and the interruption by lockage a serious obstacle. We may rest assured then, that, all Europe combined, can never have such facilities for cheap water communication as the United States. This is a mighty element in estimating the power and progress of a nation. It shows, also, why we have no such deserts as Sahara, so small a portion of our lands requiring manures or irrigation, and no general failures of crops, with so few even partial failures of any one crop. We have more deep, capacious, and safe harbors, accessible at _all tides_, than all Europe, with more than twenty capable of receiving the _Great Eastern_. (Charts, U. S. Coast Survey.)