448 FOODS 



crease in typhoid and intestinal diseases in Chicago is due to 

 the fact that a large part of the milk which is now used there 

 is pasteurized. Care concerning these two most important 

 supplies, water and milk, has greatly decreased the death 

 rate in many American cities during the present century. 

 It is estimated that the actual money loss each year in the 



A WELL WITH CONTAMINATED WATER SUPPLY 



United States because of the ravages of preventable diseases 

 is between one and two billion dollars. 



When there is any doubt about the purity of water it 

 should be boiled. This will kill the dangerous bacteria. 

 Ordinary house filters are useless and often worse than use- 

 less, as they simply become breeding places for bacteria. 

 They may make the water look clearer but they do not 

 destroy the bacteria; and it is the bacteria, not the solid 

 matter, that constitute the real danger. 



