198 



FIXING METER RATES 



cent of the results fall outside of these limits on either side, 

 representing, on the one hand, systems in which manufacturing 

 and large users are unusually developed, and, on the other hand, 

 small systems in which there are no such uses. 



The distribution of the whole output among meters of dif- 

 ferent sizes, estimated by the aid of graphical and roughly ap- 

 proximate methods, is shown by the following table: 



Service Charges. An estimate must first be made of the 

 number of meters of the different sizes that will be employed. 



It may be assumed that all domestic takers using less than 

 an average of 820 gallons per day may be supplied with f-inch 

 meters, but on the other hand, it may be that some of them 

 having fixtures requiring that water be drawn rapidly, will prefer 

 to pay the added service charge and use a f inch meter; 

 for larger takers it may be assumed that the average maximum 

 limit of output of each size of meter will correspond to an 8 

 per cent load factor and will be as follows; 



