Food Values 



359 



water when the source of water supply is near drains or places 

 where sewage has been emptied. It is a well known fact that 

 typhoid fever is often spread in this way. As water that contains 

 disease germs may appear to be clear, tasteless and even odor- 

 less, it is advisable to have the supply examined occasionally by 

 an expert. 



International Kuwsrvd, 



SAFEGUARDING THE WATER SUPPLY OF A GREAT CITY 



The chemist is testing the water for harmful substances. 



Importance of Pure Milk. Of all the foods furnished by 

 animals, milk is more nearly a complete food than any other, 

 as it contains all the nutrients in about the proper proper- 



