CORRESPONDENCE O N RAIL-CREEP. [Minutes of Mr. Bdl. with flat-bottomed rails in countries subject to extreme variations of temperature, such as did not occur in the British Isles, they did not appear to be a desirable remedy to apply to permanent way laid with chairs, as ordinarily in use at home. Mr. Miles's Paper had therefore, in his opinion, a closer bearing on the problems with which the English railway engineer was more or less troubled. The three principal causes of rail-creep, as i t affected permanent way in the British Isles, were defined in paragraphs 4, 5 , and 6, on p. 244. Assuming that the rails were, say, 45 feet in length, with joints! about CORRESPONDENCE ON RAIL-CREEP. [Mi.nutes of Dawson. following seven instances had he found rails to creep in the opposite direction to the traffic in track-mileage of more than 4,000 miles :-(a) The inner rail on a 10-chain curve near Leeds (the outer (b) Both rails crept $ inch to 1 inch on a 2-mile length ill (c) Over a mining subsidence in Yorkshire. (d) The outer rail on a check-railed curve and a rising gradient of 1 in 40. CORRESPONDENCE ON RAIL-CREEP.
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