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Show 30- Power of Horse and Mule. . Professor Henry, in his book on "Feeds and Feeding," says: Eennle found the hauling power Of a draft horse weighing 1,200 pounds equal to about 103 pounds at 2.5 miles an hour, ' or 23,000 foot-pounds per minute, for 8 hours per day a twenty-mile haul. This is a little over two-thirds of a Watt horse-power, at which value Rennie rates the average draft horse, and this is taken to be, ordinarily. velimesthe. power ol.aninn. ..Bar .. y tween 2.5 and 4 miles an hour, the hauling power of the horse is nearly inversely as the speed. The mule carries a load of 200 to 400 pounds, and its day's work consists, usually, in the transportation of the equivalent of 5,000 to 6,000 pounds per mile. The ass carries 175 pounds and upward, and its day's work is the equivalent of 3,000 to 4,000 pounds per mile. According to Weisbach, a horsa should be able to' carry 240 pounds on its back 3.5 feet per second ten hours a day. Carrying 160 pounds, he should be able to trot seven feet per second seven hours a day, doing in the day nearly ten per cent less work than before. be-fore. The pulling power of a draft animal is said to be, as a rule, aoout one-fifth Its weight Its usual effort in the case of the horse at least is seldom in excess of one-tenth, or about one-half the maximum. One hundred pounds is a common pull, for the average horse in draft vehicles. In racing, the requirement of speed reduces the work performed (carrying (carry-ing the rider) to the smallest; amount possible. Low writes: "When it is considered consid-ered that an ounce of additional loading load-ing to the same horse may make the difference of a yard or more in half a mile of running, it will be. seen how greatly the weight borne may affect the Issue in the case of horses of equal powers." |