Iiitrodvciion 



remains until 4 or 5 A. M. before it is collected 

 by the delivery wagons. Many of these 

 wagons use no ice, and even milk which is 

 properly cooled when it arrives, may become 

 in this time so warm as to be greatly injured 

 by active fermentation which such a temper- 

 ature induces. Both the railroad transpor- 

 tation and local delivery can be accom- 

 plished with much less danger of contamina- 

 tion if the milk is placed in sealed bottles 

 at the creamery. This is the best method 

 if only the bottles themselves have been 

 properly sterilized. 



William Hallock Park, M.D. 



Research Laboratory of the Department 

 of Health of the City of New York. 



27 



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