It is by no means essential that these small coasting vessels shall be propellers; for to acquire the same speed they expend the same power and have the disadvantage of being deeper in the water, and not being able to go into all harbors with much freight. They have also the advantage of carrying more sail, and being generally better able to stand coast storms than a side-wheel of light draught of water. They are not quite so expensive in prime construction, but generally require more repairs, and must be on the docks much oftener. They are, however, much better suited than side-wheel vessels to voyages where a medium speed is required, and where the steam can be used at pleasure simply as an auxiliary power. In such cases there is a profitable economy of fuel. But speed has generally been deemed essential in this country, and the side-wheel is everywhere used. But entirely the contrary is the case in Great Britain and France. There the coasting business is conducted by screws almost altogether; and the speed does not transcend the limit of economy and commercial capability. They distinguish between the extremely fast carriage of mails and passengers on the one hand, and freights on the other; and although they wish the speed and certainty of steam, yet it is not the costly speed. When they know that a given quantity of fuel will carry freight eight knots per hour, they would consider it wasteful and foolish to consume twice that quantity of fuel just to carry it ten knots; and more especially so, when, in addition to the extra quantity of fuel, they would lose just its bulk in paying freight room. England is thus employing most of her vast fleet of coasting ocean steamers in her own trade, or in the foreign trade lying within a few hundred miles of her ports. And the voyages being short, her coals being cheap and convenient, frequently not above three dollars per ton to the coasters, and in addition to this, the prime cost of these vessels being smaller than in this country, as both iron and labor are cheaper, she has found them very profitable at home, and is insinuating them into all the short routes wherever she can get a foothold. It was not until she attempted the same species of self-supporting steam navigation with distant countries, that her propeller system failed her and involved her citizens in loss. Meanwhile it is more than probable that within the next fifteen years we shall find five hundred propellers scattered along the coasts of the United States.