126 



SEWER DESIGN 



The decrease in the per capita water-consumption as the number 

 of meters in use increases is clear evidence of the effect of the 

 latter in eliminating leakage and waste. 



As a further example of a method of ascertaining the relation 

 between the amount of water used and the character of the 

 population, reference is made to Vol. VI, No. i, of the Journal 

 of the New England Water-works Association, where the rela- 

 tion is shown between the number of fixtures in a house and 

 the amount of water used. The following table, since partly 

 amended, is taken from that report. It shows that bv actual 



TABLE XVIII 



meter-readings in Newton, on houses having but one faucet, 

 7 gallons per capita per day was the average amount used, 

 the minimum being 5 and the maximum 1 1 ; that when a house 

 has two faucets, 20 per cent of additional water is used; for 

 the first bath, 50 per cent additional, etc. All these are based 

 on a family of five, the average number in Newton. If boarding- 

 houses or tenements are considered, these numbers will be 

 increased by about 7 per cent per person. 



