Thus, it frequently takes a week for a sailing vessel to do the work that a steamer will readily do in twenty-four to thirty-six hours. Say that it takes the sail four times as long as the steamer to accomplish a given voyage. To do as much business as the steamer would do in the same time, would require four sailing vessels; four times as many men as one sail requires, or probably twice as many hands in the aggregate as the steamer would have; and would incur at least twice the expense of the steamer in feeding them. Now, there is also a much larger aggregate sum invested in these four sail, and the owners pay a much larger sum of interest on their prime investment. Or, in other words, the steamer with but a few more men, but little greater expense in living, a small coal-bill, an engineer and firemen, and a prime outlay of not more than double the capital, will carry four times the freight and passengers, without incurring probably so much as three times the expense of one of the sail. After the prime cost the most important item of expenditure in one of these small steamers is the coal; but the distance run being so short, and getting into and out of the harbor and docks being so easy, the vessel does large execution at little expense. The two most essential benefits, however, of her short voyage are, that she is not compelled to carry much fuel, and consequently occupies nearly all of her space with freight; and that the prices of freight on these short voyages are much larger in proportion than they are on long voyages. Sailing vessels charge very little more for a thousand miles than they do for five hundred; but a steamer may have to charge nearly three times as much; especially if she run fast, consume much fuel, and occupy her cargo-room with coal. There are distances at which steamers, however large, can not carry a pound of freight; but occupy all their available space with the power that drives them. In these long voyages sail becomes much cheaper.