Читать книгу Barkham Burroughs' Encyclopaedia of Astounding Facts and Useful Information, 1889 - Barkham Burroughs - Страница 132

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It has been proved by actual test that a single tow-boat can transport at one trip from the Ohio to New Orleans 29,000 tons of coal, loaded in barges. Estimating in this way the boat and its tow, worked by a few men, carries as much freight to its destination as 3,000 cars and 100 locomotives, manned by 600 men, could transport.