58 BUI. I I TIN 652, r. S. DEPARTMENT OF AGRICULTURE. 



100 horsepower, as engines of this class can not be purchased in smaller sizes 

 than 75 or 100 horsepower. 



In estimating the cost of a plant the following steps arc necessary. With a 

 given capacity of plant in gallons per minute, estimate the cost of the water 



end by use of the water-end zone. In order to set the cost of the steam end the 

 indicated horsepower must be calculated first. First the water horsepower is 

 determined, knowing the capacity and lift of the plant; then this is divided by 

 the combined efficiency of the engine, transmission, pump, and piping, which 

 will give the indicated horsepower. By using the various zones of cost of differ- 

 ent types of engines, the cost of the steam end can he determined. Then by 

 combining the cost of water end and steam end the total cost of plant will be 

 determined. 



