A history of the growth of the steam-engine (1878)
Thurston, Robert Henry, 1839-1903 · New York, D. Appleton · leaf 441
O-DAY. mined by James Watt as the maximum obtainable for eighthoms a day from the strongest London draught-horses.The ordinary average draught-horse would hardly be ableto exert two-thirds as much during the eight hours steadywork of a working-day. The working-day of the steam-engine, on the other… … Fi&. 147.—The Great Eastern at Sea. day in and day out, for weeks together, as when done bysteam, would require at least three relays, or 45,000 horses.Such a stud would weigh 20,000 tons, and if harnessed tandem would extend thirty miles. It is only by such acomparison that the mind can begin…
Steam-engines
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