Clean Milk 



By 



S. D. BELCHER, M.D. 



Research Worker in the Rockefeller Institute 

 FOR Medical Research, attached to the 

 Research Laboratory of the De- 

 partment OP Health of the 



City op New York ' 



With ail Introduction by "^^^ 



WILLIAM HALLOCK PARK, M.D. 



Professor op Bacteriology and Hygiene in the 



University and Bellevue Hospital Medical 



College and Director of the Research 



Laboratory of the Department of 



Health of the City of New York 



Kcw York 



The Hardy Publishing Conijianij 



1903 



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