Animal Strength

A horse working 10 hours per day can exert a traction of 100 lbs. at a speed of 27 miles per hour, on a tow-path, or whin, or circular power. For a short time he can exert an effort sufficient to do the 33.000 ft. lbs. per minute called for by the nominal horse-power of steam engines. A man, pushing or pulling on a level, will do about as much as a horse in a working day of 10 hours; but at a crank of derrick or winch, or in pumping, where he depends mostly on the arms, a man will do about 1-10th of a horse-power of work.