38 



MAINE STATE COLLEGE 



We see that the total amount of solid matter contained in a 

 year's milk of the various animals ranged from 667 pounds up to 

 1135 pounds, or an average of 895 pounds per year. There was 

 retained in the skimmed milk and butter milk from 416 up to 829 

 pounds of dry matter, or an average of 638 pounds of dry mat- 

 ter. This is seventy-one per cent, of the total yearly production, 

 or, stated in another way, in making butter there is sent away 

 from the farm only twenty-nine per cent, of the dry matter which 

 the cows produce. It is worthy of note that seven-eighths of 

 this is contained in the skimmed milk, which is equivalent to 

 saying that the food value of the skimmed milk is seven times 

 that of the butter milk. Now, what is the total food value of the 

 waste products of the dairy, reckoned in dollars and cents ? 



At the present prices of grain it is safe to estimate the solids 

 in the butter milk and skimmed milk at two cents per pound, 

 which would give an average value per cow of $12.76 yearly. It 

 should be remembered that this material is wholly edible and 

 wholly digestible, whereas in the case of grain from fifteen to 

 twenty-five per cent, of the dry matter is indigestible and of no 

 use to the animal. 



Loss of Fat in the Waste Products of the Dairy. 



In testing the behavior of the milk of these several animals in 

 the manufacture of butter, the various lots of milk have been 

 treated exactly alike, that is, they have been set in the same cabi- 

 net, with water at the same temperature and for the same length 

 of time. 



In the table below can be seen the amounts of fat which the 

 cold setting process has failed to remove from the skimmed milk, 

 as well as the amounts of fat in the butter milk. 



Total fat in milk, 1st year 



" " " 2nd year 



Average 



Fat left in skimmed milk, 1st year. . . 

 " " " " 2nd "year.. 



Average 



Fat left in butter-milk, 1st year 



" " " 2nd year 



Average 



Total waste of fat, average 



Per cent, total fat in skimmed milk, 

 1st year 



Per cent, total fat in skimmed milk, 

 2nd year 



Average 



Per cent, total fat in butter-milk, 1st 

 year 



Per cent, total fat in butter-milk, 2nd 

 year 



Average 



Total per cent, waste of fat, average 



Jansje. 



Agnes 

 Smit. 



Nancy 

 Avon- 

 dale. 



Queen 

 Linda. 



Agnes. 



Ida. 



lbs. 

 340.4 

 286.5 



lbs. 

 251.6 



lbs. 

 208.8 

 219.5 



lbs. 

 245.9 

 269.6 



lbs. 

 352 

 337 5 



lbs. 

 237.8 

 263.1 



313.4 

 22.9 

 32.6 



251.6 

 38. 



214.1 

 248. 

 23.6 



257.7 

 64. 

 68.3 



344.7 

 13.1 



8.5 



10.8 

 1.4 

 1.7 



250 4 

 19.3 

 14.2 



27.7 

 6.1 

 2.7 



38. 

 3.2 



24 2 

 3.3 



7.1 



66.1 

 2.1 

 2.0 



16.7 

 1. 



1.4' 



4.4 

 32.1 



3.2 

 41.2 



5.2 

 29.4 



2.0 

 68.1 

 * 



1.5 

 12.3 



1.2 

 17.9 



* 



6.7 





11.9 



26.0 



3.7 



8.1 



11 38 



15.1 



10.75 



25 3 



2.5 



5.4 



9.0 



15.1 



11.3 



25.6 



3.1 



6.7 



1.8 





1.6 



0.8 



0.4 



0.4 



.9 



1.27 



3.2 



0.7 



0.5 



0.5 



1.3 

 10.3 



1.3 



16.4 



2.4 

 13.7 



.75 

 26.3 



.45 

 3.5 



.45 



7.10 



