199 



in 1897, and states the pumpage in gallons per day, the popula- 

 tion, and pertinent data concerning the systems in discussion. 

 The population is that reported by the census of 1890, and the 

 figures for 1897 would show a considerable increase owing to 

 the rapid growth of the urban population in the vicinity of 

 Chicago during the past decade. The second part of the table 

 includes the smaller cities with water-works but without de- 

 veloped sewage systems. These do not contribute to the stream 



Population and Pumpage in Cities with Sewage Systems. 



