Pwnping Stations. 131 



high per minute, equal to 159 water horse-power. It contains 36 

 scoops, with a radial length of 7 feet 10 inches each. These enter 

 the water at an angle of 13° and leave it at 31^ Extreme dip, 

 7 feet; average dip, 4 feet; and average lift, 4 feet 9 inches. 

 Number of revolutions of engines per minute, 26 ; and those of the 

 scoop wheel, 4. The wheel has 8 spokes each, in one casting of the 

 width of the wheel, with three rims bolted to the spokes, and each 

 carrying a set of oak start-posts 7 inches by 3^ inches at the rim, 

 and 4:J inches by 3^ inches at the circumference. Each set of start- 

 posts is held together by two wrought-iron rings 2J inches by \ inch, 

 one in the middle and the other about 4 inches from the water end 

 of the start. The floats are of i-inch fir, and planking is also carried 

 round the wheel at the inner end of the floats. The wheel contains 

 in planking 166 cubic feet of fir timber, equal to about 2^ tons, and 

 in oak start-posts 115 cubic feet, weighing about 2\ tons. The 

 buildings cover 3990 superficial feet of ground, the boiler-house 

 being 41 feet square ; the engine-house is 52 feet 6 inches by 28 feet; 

 and the wheel-house, 5 2 feet 6 inches by 1 6 feet. 



The cost of the engines, boilers, and scoop wheel was 4340/., 

 and of the building, 4547/. Taking the horse-power at 159 W.H.P. 

 this gives 26 '30/. for the machinery, and 28*60/. for the buildings; 

 together, 55 '90/. per horse-power in water lifted. 



Wexford Harbour Reclamation Works, Ireland. — K large 

 area of land was reclaimed from Wexford Harbour by embankments. 

 From the level of this land, as compared with the water in the 

 harbour, it was necessary to use steam power for the drainage. The 

 reclamation is divided into two districts, termed respectively the 

 North, containing 2489 acres, and South, containing 2410 acres, 

 each having a separate pumping station; that for the south side 

 being a scoop wheel and for the north a centrifugal pump. The 

 water pumped off is exclusively rainfall, which in ordinary seasons 

 amounts to 45 J mches. It was calculated that three-fourths of this 

 would have to be pumped, the remainder bemg absorbed by the 

 vegetation or taken up by evaporation. Sprmg tides in the harbour 

 rise 5 feet, and neap I ides 3 feet. The pumping station for the south 

 reclamation is situated at Drinagh, and consists of a scoop wheel 

 driven by a condensing beam engine. The engine has one 36-inch 

 cylinder, with 6 feet stroke. A variable rate of expansion can be 

 given by sliding the cams which work the steam valves. The engine 

 runs at the rate of 25 revolutions a minute. Steam is supplied by 



K 2 



