PtL7nping Siaiions, 1 1 1 



situate just inside the A frames. The arrangement of one of these 

 engines is shown in the sketch, Plate 5. The bevel mortice fly-wheel 

 gears directly into a pinion on the pump spindle, which is suspended 

 from a bracket, spanning across the engines by means of an onion bolt 

 bearing. By this arrangement, not only can the fan be readily with- 

 drawn, but the bolt allows of any necessary adjustment in the level of 

 the fan. Steam is supplied by six Lancashire boilers 23 feet by 

 6^ feet, the furnaces being 5 feet long by 2 J feet, the working pressure 

 being 50 lb. to the inch, steam being cut off in the cyhnder at quarter 

 stroke. The base plates of the engine are partly supported by the 

 brickwork, and rest on and are bolted to the cast-iron cylinder, which 

 forms the lining of the pump-well. There is one pump well to each 

 pair of engines. The pump case consists of a cast-iron cylinder, 1 2 

 feet in diameter, 9 feet 6 inches deep, open throughout its whole 

 depth on the delivery side, and furnished with self-acting gates, 12 

 feet wide. In each well is a double-inlet Appold centrifugal pump. 

 The fan is placed horizontally, and is 7 feet in diameter and 2 feet 

 4^ inches wide, the mouth of the lower suction pipe being 3 feet 6 

 inches above the floor of the well, and 4 feet 6 inches below the 

 surface of the water at the ordinary drainage level. The upper 

 suction pipe curves over, the mouth being about i foot 6 inches 

 above the other. Each pair of engines and pumps works indepen- 

 dently, and is capable of lifting 350 tons of water a minute 4 feet 

 6 inches high, being the largest amount in volume for one pump 

 which had been erected at the time. The engines are placed in 

 a brick building 34 feet by 46 feet, and 18 feet high. The boiler 

 house is 69 feet by 38 feet. The chimney shaft is square, 90 feet 

 high, and 4 feet 9 inches inside at bottom. The foundations rest 

 on a bed of Portland cement concrete. Across the main drain are 

 two sluices, each 12 feet wide, having doors to shut against the 

 water on the lower side, and a lock 70 feet long by 12 feet wide, 

 for the barges which navigate the main drain. The surface area 

 of the main drains between the pumping station and the outfall 

 sluice is about 100 acres. The machinery, buildings, and lock 

 were erected by Messrs. Eastons, Amos, and Anderson, and cost 

 17,000/. 



Taking the work done as 700 tons Hfted 4 feet 6 inches high per 

 minute, this gives 80*37/. as the cost per horse-power of water 

 lifted. 



The following account of the working of these pumps, a few years 



