Feeding Trials with Dairy Cows, 



53 



The following table shows in a convenient form the main 

 features of the results : — 





Average Daily Yield 

 of Milk per Cow 

 during Fourth week of 

 Preliminary Feeding. 



Average Daily Yield 

 of Milk per Cow 

 during the Fourth week 

 of Feeding Trial Ration. 



Cost per Day 

 of Trial Rations. 





Gallons. 



Gallons. 



s. d. 



Lot I. 



2767 



2-550 



1 2 -39 



Lot II. - 



2-920 



3^95 



1 1 -06 



Lot III. - 



2-564 



2-665 



I 0*1 1 



The results of tests for butter fat are shown below. 





Lot I. 



Lot II. 



Lot III. 



Stall Nos. of Cows. 



1 



15 



13 



22 



32 



24 



II 



20 



17 



27 



29 



26 



January 16, Morning 

 February 26, 

 March 26, „ 



3*5 

 3*25 

 3-3 



3"i 

 3-o5 

 5'o 



3-i 

 3-8 

 3-65 



30 

 3-6 

 3-5 



3 '4 

 3*55 

 3'55 



3'9 

 3*5 



3'2 



3-15 

 3-55 

 3-4 



3-8 

 2'95 

 3-6 



6'3 

 2'55 

 2 '4 



3'55 



2- 7 



3- o5 



3-o 

 3-0 



3'5 



37 

 3'55 

 3 '95 



January 16, Evening 

 February 26, „ 

 March 26, „ 



3- 6 



4- 0 

 3-8 



3-35 

 495 

 5-6 



3- 5 

 3'75 



4- 0 



3-0 

 3-6 

 3'65 



3'55 

 4-0 



47 



4-2 



4'2 



4-65 



3-3 



375 

 39 



3- 95 

 3*45 



4- 25 



6-o 



2-95 

 2-8 



4'9 

 3-85 

 3-9 



4'05 

 3-05 

 3'o5 



4'2 



4'i 

 4'3 



From these results it would appear that the percentage Of 

 fat in milk, even in that of the same cow, varied greatly from 

 causes other than food. For example, on January 16th, cow 

 17 gave a richer milk than any of the others, but on the other 

 two dates on which the milk was tested her milk was the 

 poorest. The richness of her milk on the first date was 

 accounted for by her having taken a chill and yielded rather 

 less than half the usual quantity. In the case of cow 1 5 also 

 there was a great difference in the quality of the milk 

 yielded on the dates of the first and last tests, resulting from 

 some cause which has not been traced. The evening milk of 

 the cows was, with only three exceptions, richer than the 

 morning milk, but the extent of difference in quality was 

 very variable ; it differed considerably with the various cows 



