. American farming and stock raising, with useful facts for the household, devoted to farming in all its departments. Agriculture. APPENDIX. 1967 The length of tlie evener is in all cases from center to center of the whippletree pins. In the case of the last-mentioned mower, if one end of the evener is 4 inches in advance of the other end, a variation that is not unusual, the horse that is ahead would be working on the arm of a lever inches long, and the horse falling behind on an arm inches long. The rear horse would therefore have, an advantage in leverage of inches. Taking the
. American farming and stock raising, with useful facts for the household, devoted to farming in all its departments. Agriculture. APPENDIX. 1967 The length of tlie evener is in all cases from center to center of the whippletree pins. In the case of the last-mentioned mower, if one end of the evener is 4 inches in advance of the other end, a variation that is not unusual, the horse that is ahead would be working on the arm of a lever inches long, and the horse falling behind on an arm inches long. The rear horse would therefore have, an advantage in leverage of inches. Taking the draft of a mower at 200 pounds, which is about the average of the New York trials, the forward horse would be drawing pounds, and its mate pounds, a difference of nearly 19 pounds, or almost ten per cent, of the load. The significance of this difference in the work performed by two horses wiU be seen by reference to the estimates of engineers of the efficiency of a horse when working ten hours a day. According to Wood an ordinary horse is capable of exerting a traction force of 125 pounds when moving at the rate of two miles an hour, 83 pounds at the rate of 3 miles an hour, 62 pounds at the rate of 4 miles an hour, 50 pounds at 5 miles an hour, 42 pounds at 6 miles an hour, 36 pounds at 7 miles an hour, and 31 pounds at 8 miles an hour. " As the speed of a horse increases his power of draft diminishes very rapidly till at last he can only move his own ; As the speed increases the hours of work per day must be dimin- ished to prevent exhaustion. From the New York plow trials a fair average of the draft of two-horse plows may be taken at 350 pounds, or 175 pounds for each horse. The average draft of both mowers and plows, it will be seen, considerably exceeds the engineer's estimate of the power of an average horse, moving at the rate of 3 or 4 miles an hour, when working ten hours a day. A common form of evener used in ploughing is given in the foll
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectagriculture, bookyear
