AGRICULTURAL EXPERIMENT STATION. 



45 



Special Test of Loss of Fat. 



Weight of milk taken morning 125 lbs. 



" " night &3J " 



of sweet cream, total 38J " 



of skimmed milk, morning 103 " 



night 66| " 



of sour cream, total 374 " 



Sour 

 Cream. 



Solids in 100 lbs 

 Fat in 100 lbs ... 



Whole milk. 



Skimmed milk. 



Sweet 

 Cream. 



Morn. 



Night. 



Morn. 



lbs. 

 9.99 

 .685 



Night. 



lbs. 

 9.69 

 .478 



lbs. 

 12.75 

 3.75 



lbs. 

 13.02 

 4.07 



lbs. 



25.77 



18.19 



lbs. 

 25.80 



18.17 



Contained in whole milk 26.83 lbs. solids, 8.09 lbs. fat. 



" in sour milk and sweet cream 26.68 " 8.02 " 



" in sour milk and sour cream 26.34 " 7.77 " 



Fat not accounted for in sour milk and sour cream, .32 lbs. = 4 # of total fat. 



In no instance was the amount of fat in the skimmed milk and 

 the sour cream equal to that of the whole milk, the discrepancy, or 

 apparent loss, amounting in the several cows to from four to seven 

 per cent, of the total fat in the milk. It should be noted that in 

 the special trial where a large quantity of milk is used, the fat of 

 the sweet cream plus that of the skimmed milk accounts 

 for practically that of the whole milk. The cream was 

 allowed to stand a longer time than usual before churning and 

 diminished in weight from evaporation or otherwise a pound and 

 three-eights. The percentage of fat seems to have remained 

 unchanged, however, and the sour cream, although the weights 

 were taken without pouring the cream from one can to another, 

 thus avoiding any mechanical loss, contained by analysis a quarter 

 of a pound less of fat than the sweet cream. This indicates a 

 loss of fat not yet explained. These trials would have 

 been repeated in a more exhaustive manner had not lack of time 

 prevented, but this will be done, and further investigation may 

 show that this loss has been wholly mechanical. 



