34 



MILK HYGIENE 



Therefore, by milking a single cow, one can obtain 

 milk of the greatest variety of fat content, whicli must 

 be considered when samples are taken from individual 

 animals for the purpose of examination. According to 

 Hittcher's investigations, the situation seems, singularly 

 enough, to be wholly changed if the calf is permitted to 

 suck the cow; the milk that remains is not rich, but is 

 much poorer in fat. 



The opinion expressed in recent years, that by 

 a special method of milking the average fat percent- 

 age of milk of individual cows may be raised, is in- 

 correct. 



6. Daily variations. Daily examinations of milk of 

 individual cows show that not only the quantity of milk 

 undergoes change from day to day, but, at the same 



