AMOUNT OF SEWAGE PER CAPITA 



121 



concluded that the needless waste 

 in New York City was 75 gallons 

 per head per day. His conclusion 

 seemed to be justified by a com- 

 parison of the consumption curves 

 of New York with those of Fall 

 River and Woonsocket, Fig. 28,* 

 the similarity being very marked, 

 except for the constant excess in 

 length of the New York ordi- 

 nates. 



Mr. Fuertes,f on the other 

 hand, believes that a large night 

 flow is a necessary accompaniment 

 of a large, progressive, manufactur- 

 ing city. He cites the night-con- 

 sumption in Chicago (165 gallons 

 per capita) for comparison and 

 compares it with a night flow of 

 1 06 gallons per capita in a certain 

 district in the Bronx. It was 

 known that in this last, the mains 

 were new, the buildings generally 

 metered, and that this large night 

 flow was due to its use in manu- 

 facturing. Mr. Fuertes says that 

 it appears to him that data con- 

 cerning night-consumption in large 

 cities are really of little practical 

 value in forming a foundation on 

 which to build up demonstrations 

 of excessive wastage. 



But there can be little doubt 

 of the value of this sort of study 



* Redrawn from Diagrams Nos. 5 and 6. 

 t Fuertes' Report, p. 124. 



Rate of Consumption. 

 Gallons per Cap per Day 



Noon 



& 



Md- 



night 



Noon 



Noon 

 * 



Md- 



? 



Noon 



Noon 



Mid- 

 ht 



Noon 



Mid- 

 night 



FIG. 28. 



