THE SANITARY FACTORS 83 



Finally, the newer ideas on sanitary milk produc- 

 tion the insistence on effective method as opposed to 

 observance of arbitrary, unessential requirements, 

 are steadily making their way into practice. Speaking 

 of the fact that the conditions which are ordinarily ob- 

 served by the dairy inspector bear no definite relation 

 to the sanitary character of the milk itself, Dr. North 

 says : 



The production of " Grade A Milk" for the New York 

 City market in several thousand barns of the ordinary type 

 by the rank and file of dairy farmers, such milk in most cases 

 conforming with standards for bacteria of 25,000, and even 

 10,000, is a demonstration of this fact on a gigantic scale. 13 



AMENDMENT OF THE DAIRY SCORE CARD 



We may now return to the question whether, in 

 view of the knowledge now at hand of the really essen- 

 tial factors in clean milk production, the dairy score 

 card can be satisfactorily amended. 



Efforts have from time to time been made to correct 

 the inadequacy of score cards by assigning more weight 

 to methods than to equipment and by assigning a 

 greater value than previously to certain of the methods. 

 Even so, Harris has shown from the study of Brew 

 which has already been cited that the two cards which 

 gave 60 per cent to methods differed distinctly more 

 in estimation of methods than in that of equipment, 

 and that even when the score for methods alone was 

 considered there was no distinct correlation with the 

 bacterial counts. This leads Dr. Harris to remark 

 that "the lower correlation of the values assigned for 

 methods as compared with those for equipment is 



