. Revised and enlarged ed. of the science of railways . ^ than in the UnitedStates. For sixty years after railroads were opened inAmerica stringent regulations designed to pre-vent overloading cars were enforced. The maxi-mum load was ten tons, and this long after theroadbed had been strengthened and the weightof the rails had been increased to the heaviestpattern known. This persistence illustrates theforce of hal)it. Because ten tons was a reasona-ble load for the light rail, and unstable bridgesand track, of the earlier roads, it did not occur to. Standard American Postal Car. Length, 60 ft
. Revised and enlarged ed. of the science of railways . ^ than in the UnitedStates. For sixty years after railroads were opened inAmerica stringent regulations designed to pre-vent overloading cars were enforced. The maxi-mum load was ten tons, and this long after theroadbed had been strengthened and the weightof the rails had been increased to the heaviestpattern known. This persistence illustrates theforce of hal)it. Because ten tons was a reasona-ble load for the light rail, and unstable bridgesand track, of the earlier roads, it did not occur to. Standard American Postal Car. Length, 60 ft., 9 in.; width, 9 ft., 10 in.;height, 13 11 in.; weight, 62,000 lbs. any one to change or increase it for fully sixtyyears. Then it suggested itself to the managersof American roads that thirty or even forty tonsmight be hauled in a car more advantageouslythan ten. Accordingly all new cars were builtto conform thereto. The change will be highlybeneficial, as it will effect great saving in thenumber of cars and the relative cost of haulingand handling. The new car, it is to be remarked,is little, if any, larger than the old one, but itis stronger and its body is supported by a sub-stantial truss on either side, as shown in theillustration. 206 RAIL WA Y EQ UIPMENT. The freight car load in England and on thecontinent is very light compared with ours. Thecars used are much shorter than the Americanpattern and correspondingly weaker. Our carshave uniformly eight wheels; theirs, as a rule,only four. Moreover, the practice so general inAmeric
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