458 



Our Surroundings 



is sufficient reason for a pure supply, 

 tains no disease-producing germs. 



Each 



Pure water con- 



Brown Brothers. 



A FILTRATION PLANTJO PURIFY 

 WATER 



year there are in the 

 United States hundreds of thou- 

 sands of cases of typhoid fever, 

 many of which have been traced 

 to the use of water containing 

 disease germs. In places where 

 the water has been freed from 

 germs, the per cent of deaths from 

 typhoid has been greatly lowered. 

 This is a good illustration of the 

 power of man to rid himself of a 

 parasitic disease by controlling his 

 surroundings. When one suspects 

 that water contains disease germs, 

 he should not drink it until it has been boiled for some time. 

 Milk Supply. To people living on farms and deriving their 

 milk from their own cows, the problem of milk supply seems 

 simple. By keeping healthy cows in clean, well-lighted sur- 

 roundings, providing them with 

 pure water and food, observing 

 habits of personal cleanliness in 

 milking, cooling the milk properly, 

 and keeping it in sanitary places, 

 the family is always sure of hav- 

 ing plenty of pure milk. 



The problem is not so simple 

 in communities where families 

 must depend on milk dealers. 

 Even in small communities, epi- 

 demics of typhoid fever, diph- 

 theria, and other diseases have 



been caused by the lack of cleanliness on the part of milkmen. The 

 problem becomes many times more complicated in a great city 

 where the daily supply comes from thousands of dairies located 

 in widely-separated places. In all well-governed cities, boards 



Brown Brothers. 



INTERIOR OF A FILTRATION 

 PLANT 



