Pumping Stations. 123 



6 inches stroke. The pump is of the vertical spindle pattern, with 

 single inlet, with balance fan 5 feet 4 inches diameter and i foot 2' 

 inches deep, placed at such a level that the lowest water in the drain 

 will cover it. The inlet is 2 feet 8 inches diameter, formed on the 

 lower side only, special provision being made for balancing, the 

 weight of the column of water above the fan being balanced by the 

 fixed inlet piece, which also serves to steady the lower end of the 

 fan spindle. The meeting faces between the fan and the fixed case 

 are both turned in the same direction, so that wear as it takes place 

 can be taken up simply by lowering the fan spindle by means of an 

 adjustment provided for the purpose. To take up the momentum of 

 the water issuing at great speed from the fan, patent guide curves 

 were fitted, which turned the water gradually into the vertical direc- 

 tion, and at the same time assisted to bring it to rest. In this parti- 

 cular instance these guide curves were not found to be of much avail, 

 as when the river was very low, the delivery was lower than the top 

 of the blades, and consequently there was a churning action going on 

 with the water in the well, which caused vibration in the spindle. 

 They were, therefore, removed. The pump is placed at the bottom 

 of a brick well, in one side of which is the outlet passage 4 feet wide 

 by 4 feet 6 inches high, fitted with self-acting doors, and communi- 

 cating with a cast-iron outlet pipe 4 feet 6 inches diameter and about 

 68 feet long. The upper end of the fan spindle hangs in an onion 

 bearing, and is driven by a pair of bevel wheels from a horizontal 

 shaft which passes into the engine-house, on which is a pinion driven 

 by annular gearing, bolted to the rim of the fly-wheel of the engine. 

 The pump is calculated to lift 95 tons per minute at 8 feet lift, 

 88 tons at 9 feet, ^z t<^^s at 10 feet, 78 tons at 11 feet, 74 tons at 

 12 feet, 71 tons at 13 feet, 68 tons at 14 feet, 65 tons at 15 feet 

 The cost of the machinery, including engme, pump, and two boilers, 

 was 3853/. The buildings, engine-house, boiler-house, pump-well, 

 chimney-base, piling, and concrete, cost about 1064/. At the trials 

 v/hich took place when the new engine was started it was found that 

 the old engine indicated 103-33 horse-power when delivering the 

 water to a height of 9*78 feet; the new engine when indicating 

 106 horse-power delivered 75*93 tons to a height of 10-84 feet; the 

 coal consumption was at the rate of sf cwt. per hour, and as com- 

 pared with that of the old engine in the proportion of 3 to 5. At a 

 subsequent trial a weir 13 feet wide was placed across the outlet 

 drain, the difference of level between the water in the inlet drain 



