MILK AND ITS CARE. 



165 



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Most of the 

 bacteria found in 

 milk are perfectly 

 harmless, a 1 - 

 though at times 

 those causing 

 diseases, such as 

 typhoid fever, 

 diphtheria, and 

 tuberculosis, may 

 get into the milk. 

 It is impossible 

 to keep all bac- 

 teria out of milk, 

 but a great deal 

 can be done to- 

 ward keeping 

 them out, and 

 keeping those 

 that do get in 

 from growing 



(Fig- 37)- 



2. Keeping B ac- 



LCTia UlltOJ Itl'llK. FIG . 2J. PURE AND IMPURE MILK 



This process HIGHLY MAGNIFIED. 



i i A, pure milk; B, after standing in a warm room 



nidj/ f or a f ew hours in a dirty dish, showing, be- 



UD ill One WOrd sides the fat globules, many forms of 



bacteria. 



cleanliness. 



The bacteria (Fig. 37) get -into milk with 

 dust particles from many sources, but the most 



