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Show Interesting Method Used to Determine Horsepower A recent engineering test In a Chicago Chi-cago laboratory showed that an automobile auto-mobile engine running 20 miles an hour and equipped with spark plugs that had been In use slightly more than 10,000 miles, developed 20.6 horse power. The game engine with a new set of plugs gave a horse power reading of 23.4. One "horse power" Is sufficient to lift 33,000 pounds one foot In one minute. The method used In determining this unit Is very Interesting. Back In the Eighteenth century, James Watt, in ventor of the steam engine, and Matthew Mat-thew Boulton started to manufacture hoisting engines to replace the horses then used in the coal mines of England. Eng-land. In order to compnre the power of one of their engines with that of the number of horses required to perform the same work, they undertook to test the pulling power of a heavy draft horse. They found that a horse could lift 330 pounds of coal 100 feet In one minute, which ts equivalent to lifting 83,000 pounds one foot In one minute. |