SEWAGE DISPOSAL 



505 



Project. Inspect the conditions in your own home block or in the 

 town in which you live. Make a map showing the buildings. Locate 

 all houses, stores, factories, etc. Indicate any cases of communicable 

 disease on the map. Mark all heaps of refuse in the street, all un- 

 covered garbage pails, any street stands or push carts which sell 

 uncovered fruit, and any 

 stores which have an ex- 

 cessive number of flies. 

 Note any other unsanitary 

 conditions and mark them 

 with appropriate symbols. 



Sewage disposal. Sew- 

 age disposal is an impor- 

 tant sanitary problem for 

 every city. Some cities, 

 like New York, pour their 

 sewage directly into rivers 

 which flow into the ocean. 

 Consequently, much of 

 the liquid which bathes 

 the shores of Manhattan 

 Island is dilute sewage. 

 Other cities, like Buffalo 

 or Cleveland, send their 

 sewage into the lakes from 

 which they obtain their 

 supply of drinking water. 

 The city of Chicago has 



built a huge drainage canal which diverts water from Lake Michi- 

 gan. Through this canal the sewage is diluted and is carried 

 eventually into the Mississippi River by way of the Illinois River. 

 While there is not a noticeable increase in the bacterial content of 

 the Illinois River at the point where it flows into the Mississippi, 

 this drainage canal has done harm in another way. The fish in the 

 upper Illinois River have been driven out or killed by the factory 

 refuse and other wastes which come down the canal. This is only 

 one example of the pollution of rivers by sewage and especially by 

 factory wastes. All over the eastern part of our country rivers 

 have been made open sewers, and now the conservation of our fish, 



Armour and Co. 



Inspectors are employed by the government to inspect 

 and stamp all meat sent to other states. 



