WINDMII^LS AND PUMPS. 38 1 



ing. Mr. F. H. Harvey's wheel at Douglas, Wyoming, 

 is ten feet in diameter, fourteen feet long, and secures 

 sixty horse-power, operating a 3)^ -inch pump, which 

 delivers one hundred gallons of water a minute to a 

 hight of sixteen feet. The same power is sufficient 

 to operate a five-inch pump, which would raise 

 seven thousand gallons a minute. The cost of the 

 wheel compared with what it accomplishes is but a 

 trifle. lyabor and material, including the pump on the 

 Harvey plant, amounted to $1,200. As much of the 

 work was experimental, it was necessarily slow. A 

 like plant can be put in for $800, and most of the work 

 can be done by the farmer. The daily expense of 

 operation is merely nominal, and it requires no attend- 

 dance except to oil the machinery occasionally. 



The Hurdy-Gurdy. — This is a late improvement 

 which is best illustrated in Fig. 89, which shows the 

 runner only and does not include the gearing. This 

 wheel is of the impulse and reacftion class especially 

 adapted to high heads and mountain streams. This 

 cascade wheel has been placed under heads as high as 

 seven hundred feet, and is capable of utilizing head 

 pressures as high as 2,000 to 2,500 feet. The water is 

 admitted to the wheel by means of nozzles proj celling 

 one or more jets, which strike the circular ridge divid- 

 ing the water into equal portions, passing into the 

 buckets, the buckets alternating to the jet, the arrange- 

 ment giving ninety per cent, of efficiency. The gear- 

 ing of this wheel is easily applied to rotary or centrif- 

 ugal pumps, and water is raised in this way. The 

 turbine class of water-wheels operates upon a different 

 principle. Turbines are submerged entirely under the 



