44 



MAINE STATE COLLEGE 



seems hardly possible that ten per cent, of the total butter fat in 

 the milk adheres to the milk pails and cans in which the milk is 

 set. To be sure, the amount of waste in this way has been rela- 

 tively much larger because the quantity of milk and cream 

 handled at each time was small, and so the amount adhering to 

 the dairy utensils was a much larger proportion of the total dry 

 matter in the milk. The method of calculation used in securing 

 these figures should be regarded with some suspicion, perhaps, 

 for as has has been stated, the product for each month, not only 

 of milk, skimmed milk, but also of cream is assumed to have the 

 same composition that is found for five days in the month, and 

 all the calculations are made on this basis. In this way errors 

 may have arisen, but it is hardly probable that they would all 

 occur on one side and uniformly cause a discrepancy in the same 

 direction. In order to test this matter more correctly and thor- 

 oughly, calculations have been made based upon the actual yield 

 and composition of the milk and other products during the five 

 days on which the cows were tested. A large part of the analy. 

 ■es made in 1888 were made of both the night's and morning's milk, 

 and as the records show the the weights of each mess of milk, 

 of the skimmed milk and of the total amount of cream at the 

 time when it was ready for the churn, it is possible to ascertain 

 whether any loss of fat occurred. This has been done for four 

 cows during the period of five days in June and a similar period 

 in July. Besides these calculations, a special test has been made 

 in which quite a large quantity of milk of known composition 

 was taken. This latter trial was made in February, 1890. These 

 additional results are shown below. 



?une, 1888. 

 otal in whole milk. 



in skimmed milk : 12.29 



in sour cream. 



Deficiency 

 Per cent, loss fat ... 

 July, 1888. 

 Totai in whole milk. , 



in skimmed milk. 

 in sour cream.... 



Deficiency 

 Per cent, loss fat . . . 



Chloe. 



Lois. 



Jansje. 



Nancy 

 Arondale. 



m 



to 



in 



2 



m 



el 



to 



o 



2 



o 



05 



Is 



to 



m 



as 



to 



lbs. 

 17-30 



lbs. 

 4.68 



lbs. 



14.92 



lbs. 

 4.24 



lbs. 

 22.97 



lbs. 

 6.32 



lbs. 

 16.50 



lbs. 

 4.36 



12.29 

 4.75 



.73 

 3.62 



10.36 

 4.33 



.78 

 3.27 



15.26 

 6.94 



.81 

 5.14 



11. '0 .82 

 | 4.67 3.28 



17.04 

 .26 



14.29 



4.35 



.33 



7.00 



3.79 



14.69 

 .23 



4.05 



.19 



4.5 



3.10 



22.20 

 .77 



17.05 



5.95 

 .37 

 5.8 



4.40- 



15.77 

 .73 



4.10 



.26 



6.00 



3.71 



9.67 

 4.21 



.39 

 3.19 



.44 

 2.53 



10.80 

 5.74 



16.54 

 .51 



.29! 

 3.86 



4.15 



.25 



5.70 



.51 



3.04 



13.88 

 .41 



3.58 

 .21 



5.50 



2.97 

 .13 



4.20 



3.55 

 •19 



4.30 



