CITY WATER SYSTEMS 



485 



568. Development of City Water Systems. The modern 

 city water system has been developed within the last century. 

 We shall see in Chap. X, Sec. VI, that the steam engine was 



FIG. 297. Central Square Water Works, 1800. From History of 

 Sanitation, Cosgrove. 



still a very crude machine at the beginning of the 19th cen- 

 tury. City water systems were still less well developed. 

 Philadelphia was one of the first of American cities to con- 

 struct a city water system. Figure 297 is a section through the 



