Clean Milk 



Medical Research. This work was under the 

 direction and supervision of Dr. Park and 

 formed a part of the movement for the im- 

 provement of New York city's milk supply, 

 conducted by Dr. Park, with the co-operation 

 of the Rockefeller Institute for Medical Re- 

 search, for the Department of Health of the 

 City of New York. 



In the performance of that work and in the 

 making of this book, the author has been at 

 all times indebted to Dr. Park for sugges- 

 tions and criticism, and is glad of this oppor- 

 tunity of making public acknowledgment of 

 the benefit derived from working under his 

 personal direction. 



To the many gentlemen who courteously 

 offered their establishments as experiment 

 stations, acknowledgment is also due, and 

 to Walter W. Law, Esq., the proprietor of 

 Briarcliff Farms, and to Mr. Loton Horton, 

 the President of the Sheffield Farms-Slaw- 

 son-Decker Co. for their interest and encour- 

 agement during the progress of the work. 



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