THE MILK CONTRACTOR 



257 



times decreased; that more evidence is needed as regards the effect of 

 the machine on the keeping quality of the milk; and that the best results 

 are obtained when clarification is followed by pasteurization. It is also 

 his opinion that the machines do greatest service in removing the dirt, 

 hairs, and blood, which even under cleanly conditions and careful man- 

 agement get into milk in small amounts and which no one wishes to drink. 

 The objection has been raised to these machines that in reality they are 

 a fraud on the consumer in that by removing the visible dirt they mislead 

 him into the belief that the milk has never been contaminated. This 

 seems an extreme position to take, for every one knows that it is impossi- 

 ble to collect tons upon tons of milk for city delivery without some dirt 

 accumulating in it, and on esthetical grounds.it seems best to remove as 

 much of it as possible. If the clarifiers show an unreasonable amount of 

 dirt the remedy is to trace the dirty milk back to the country and shut 

 the dairymen that are producing it out of the city till they are prepared 



TABLE 76. EFFECT OF CLARIFYING MILK ON THE BACTERIAL AND CELL COUNTS 

 (BOSTON BIOCHEMICAL LABORATORY) 

 Machine A Working at 6,000 r.p.m. 



17 



