128 



MAINE STATE COLLEGE 



Tt appears that the solids of the skimmed milk and butter milk 

 range with thes-e five cows from 63 per cent, to 77 per cent, of the 

 total milk solids, and that the total quantity of solids in the 

 skimmed milk is from five to ten times as large as those of the 

 butter milk. 



The Waste of Fat in the Skimmed Milk and Butter Milk. 



A cow's butter producing capacity does not wholly depend upon 

 the quantity and quality of her milk, but in part also upon the 

 amount of fat that is retained by the skimmed milk and buttermilk. 

 It is possible that the centrifugal machine or butter extractor will 

 reduce all milk, without regard to breed or individual, to the same 

 level in the matter of waste, but with the present cold- setting 

 method, even when it is well managed, there is an unquestioned 

 difference in the way in which the milk of different cows behaves. 



The cows involved in this test furnish a striking illustration not 

 only of the great variation with different animals of the fat in the 

 waste products from butter-making, but also of the large loss that 

 may occur in ordinary practice and not be observed. It is very evi- 

 dent that the individuality of the animal has much more to do with 

 the amount of fat left in the skimmed milk than has food or 

 season. 



The figures below are suggestive, and in part furnish an argu- 

 ment for the use of the separator : 



Table jShowing the Waste of Fat tn the Skimmed Milk 

 AND Butter Milk for One Year. 







5 



< 



3 









'a? 



>, 



S 

 ^ 







>— 1 





lbs. 



lbs. 



lbs. 



lbs. 



lbs. 



Total fat in milk 



340.4 



208.8 



245.9 



352. 



237.8 







Fat left in skiinnied milk 



22.9 

 6.1 



24.8 

 3.3 



64. 

 2.1 



13.1 

 1.4 



19.3 



Fat left in butter milk 



1.0 



Total fat in waste products 



29. 



28.1 



06.1 



14.0 



20.3 



Per cent, waste in skimmed milk 



0/ 



/o 

 6.7 



0/ 



/o 

 11.9 



0/ 



/o 

 26.0 



0/ 



/o 

 3.7 



/o 

 8.1 



'•'■ '• " buttermilk 



1.8 



1.6 



0.8 



0.4 



0.4 



'* total waste 



8.0 



12.5 



26.8 



4.1 



8.5 







