184 CONFERENCE ON MILK PROBLEMS 



comply with the requirements specified for the. production of 

 milk of classes 1 (certified) and % (inspected) is to be pasteur- 

 ized before being sold,' and then sold under the designation 

 'pasteurized milk.' All milk of unknown origin shall be placed 

 in class 3 and shall be subjected to clarification and pasteur- 

 ization at central pasteurization plants which shall be under 

 the personal supervision of officers of the health department. 

 The term 'pasteurization' is explained to mean the heating of 

 the milk to a temperature of 150 F. for twenty minutes, or 

 160 for ten minutes, and immediate cooling to 50." 



The members of this conference were members of citizens' 

 associations, scientists from the various Government labora- 

 tories, other representatives from Government departments, 

 milk producers and dealers, and medical men of Washington. 



The series of monographs in Bulletin 56 "Milk and its Re- 

 lation to the Public Health," has fulfilled the prediction that 

 this work would serve as a guide for the world. The daily 

 quotations from it attest its value. 



Year after year since the spring of 1907 without success 

 have efforts been made to secure from Congress the legislation 

 recommended by the Washington Milk Conference. This agi- 

 tation has, however, produced good results. Much better milk 

 is now delivered. 



The greatest step forward has been made in the last few 

 weeks. Encouraged by the universal commendation of the 

 recommendations of the Washington Milk Conference, and for- 

 tified by the knowledge that high bacterial counts are proofs 

 of old or dirty milk, the Department of Agriculture on Octo- 

 ber 14? issued the following order: 



"SPECIAL, ORDER TO THE CHIEFS OF BUREAUS, OFFICES, AND 

 INDEPENDENT DIVISIONS 



"In order that no milk containing extraneous matter, raw 

 milk from cows not known to be free from tuberculosis, or milk 

 of unknown origin may be sold within certain buildings occu- 

 pied by the Department of Agriculture in Washington, D. C., 

 it is hereby ordered that no milk shall be sold within any 

 building occupied by the Department of Agriculture which is 

 not equal to the classification as defined in Bureau of Animal 

 Industry Circular 



