and the comparative profit, as five less one to three less two and seven-twelfths, or as four to five-twelfths, or as nine and six-tenths to one.

America has, it is true, a grander system of natural water-communication than any other land except Brazil; but, for all that, there is really but a small part of the area, either of the Alleghany coal and iron fields, or of the granaries of the Mississippi valley, reached even by our matchless rivers.  A certain strip or band of country, bordering the water-courses, is served by them both as regards export and import; just as much is served wherever we build a railroad.  In fact, whenever we lay a road across a State, whether it connects the West directly with the East, or only with some central commercial point in the West, just so often do we open to market a band of country as long as the road, and thirty, forty, or fifty miles wide,—­the width depending very much upon the cost of transport over such road; and as the charge is much less upon a railroad than upon a common road, the distance from the road from which produce may be brought is much greater with the former than with the latter.  The actual determination of the width of the band is a simple problem, when the commercial nature of the country is known.

The people of the great valley have not been slow, where Nature has denied them the natural, to make for themselves artificial rivers of iron.  These railroads are more completely adapted to the physical character of the Western States than would be any other mode of communication.  The work of construction is oftentimes very light, little more being necessary for a railway across the prairies of the West (generally) than a couple of ditches twenty or thirty feet apart, the material taken therefrom being thrown into the intermediate space, thus forming the surface which supports the crossties, the sills or sleepers, and the rails.  Indeed, the double operation of ditching and embanking is in some cases performed by a single machine, (a nondescript affair, in appearance half-way between a threshing-machine and a hundred-and-twenty-pound field-piece,) drawn by six, eight, or ten pairs of oxen.

It is even probable that in a great many cases the common road would cost more than the railway in the great central basin of America; as the rich alluvial soil, when wet in spring or fall, is almost impassable, and lack of stone and timber prevents the construction of artificial roads.

The influence of the railroad upon the Western farm-lands is quickly seen by the following figures, extracted from a lately published work on railroad construction.

Table showing the Effect of Railroad Transport upon the Value of Grain in the Market of Chicago, Illinois.