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The Priam is an engine made at the works of Gilkes, Wilson and Co., Middlesbrough, in November, 1847. It has two outside cylinders, each 15in. diameter, and a 22in. stroke. It is coupled with four 5ft. wheels, and a pair of leading wheels, each 3ft. 6in. diameter. It has four eccentric sheaves, and two link motions. The boiler is 14ft. long by 3ft. 6in. diameter, and has 125 iron tubes, each 2in. diameter. It has two pumps, and works with a boiler pressure of 95 lb. The weight of the engine in working order is 28 tons.