370 MILK AND THE PUBLIC HEALTH ch. xix 



will safeguard the chemical composition, and freedom from 

 preservatives, ensure clean milk only being sent into the city, 

 prevent initially insufficiently cooled milk being sent into the 

 city, enable outbreaks of milk-borne infectious diseases to be 

 traced, and ensure that only milk certified as to standard and 

 quality shall be distributed to milk-vendors or householders. 



