Drainage by Steam Power. 67 



land drained, 3S,ooo acres. The pumps were calculated to 

 raise 700 tons of water 4 feet 6 inches high per minute, equal 

 to 80*37/. P^i' horse-power of water lifted. The cost of the 

 two stations at the Wexford Harbour Reclamation Works 

 was 91 • 10/. for buildings and machinery at the north station, 

 where the pump was erected, being 37/. for machinery and 

 54/. lOi-. for buildings ; and 40/. per horse-power for the scoop 

 wheel and engine — the cost of the buildings not being given 

 in this station. The cost of an iron scoop wheel with curved 

 blades and horizontal engine, erected by Messrs. Appleby, for 

 the drainage of the Upwell district, in Norfolk, was 2680/. 

 — equal to 74*68/. per horse-power of water lifted for the 

 machinery, and 26*40/. for the buildings — together, ioi'o8/. 

 Centrifugal pumps, driven by semi-portable engines, housed in 

 wooden buildings, have been erected in the Fen districts at 

 from 70/. to 80/. per horse-power of water lifted. In Holland 

 the cost of erecting pumping machinery for horse-powers 

 varying from 14 up to 500 during recent years has averaged 

 92/. per effective horse-power * for scoop wheels, the amounts 

 varying from 58/. for the largest machines to 106/. for the 

 smallest. The buildings have cost 46*1/. per horse-power, 

 and the machines 46*3/. For centrifugal pumps the cost has 

 been 36*8/. for machinery, and 34 '2/. for buildings — together, 

 71/. The variation in cost for pumps has not been so great 

 between the larger and smaller machines as that for wheels. 

 The cost of erecting screw pumps is given at from ^61 to lOO/. 

 for buildings and machinery — the average being about 94/. 

 per effective horse-power, the power varying from 12 to 

 1 30 horse-power. 



In California, in the valley on the western side of the Sierra 

 Nevada, where centrifugal pumps are used for raising the 

 water for irrigation, and where a number of small separate 

 pumping stations widely distributed are required instead of 

 one large establishment, owing to the distance of transport, 

 * Cuppari, * On Pump ng Engines m Holland/ Trans. Inst. C.E., vol kxv. 



F 2 



