CHAP, iv DRINKS AND NARCOTICS 31 



34. Impure Water. Typhoid fever, dysentery, chol- 

 era, and many other dangerous diseases are generally 

 due to germs that live in the water. Many of these 

 diseases can be traced directly to some well located in 

 a barnyard, or other filthy place, from which surface 

 water is drained into it. People are often careless >* 

 in choosing a location for a well for drinking Vrp 

 purposes. It should not be dug in a low 



FlG. ii. Showing how surface drainage may contaminate the water of a 

 badly located well (Zuppke). 



place, where water from all directions may run into it, 

 but on a spot on a level with the house and barn and 

 sufficiently removed from all sources of contamination. 

 The germs in drinking water are the direct cause of 

 thousands of deaths yearly, both in the country and in 

 our large cities. 



Many people filter the drinking water. This is an 



