LLIN0IS STATE DAIRYMEN S ASSOCIATION. 



215 



The record shows that the 1179 lbs. of milk brought 

 by patron No. 1 contained 42.75 lbs. butter fat as shown 

 by the daily test, or 42.41 lbs. if calculated by the com- 

 posite sample test, a difference so slight as to be of no 

 consequence when the saving of tests is taken into 

 account. 



The uniformity in the quantity and quality of milk 

 given by the same lot of cows each day, helps to make 

 the " composite " sample test, practically accurate for 

 calculating the butter fat delivered to the creameries 

 by the patrons each week, and necessitates only one 

 test instead of seven. 



This plan of testing composite samples of milk brought 

 to a creamery by its patrons has the same practical 

 value to the dairymen who may use it in testing each 

 of his cows. 



Also the average daily record per cow calculated 

 from the total daily production of the whole herd. 



Yield of milk, per cent, of butter fat, yield of n utter. 

 No . of coav and 



period of milking 



Pounds of milk 



Per cent, of 



Lbs. of butter fat. 



after May 1. 





butter fat 







Daily yield 



Daily yield 



Daily yield 





high low avg. 



high low avg. 



high low avg. 



No. 1, to July 27 



13 5.5 10.3 



8. 4.25 5.28 



.666 .312 .539 



No. 2, to Aug. 1 



2.i 15. 18.7 



6.45 3. 4.7 



1.297 .574 .885 



No. 3, to July 1 



11 4 7.9 



4.3 2.9 3.56 



.369 .16 .28 



No. 4, to Aug. 1 



45 25.5 38.2 



3.95 1.7 2.99 



1.71 .603 1.141 



No. 5, to Aug. 1 



20.5 10 15.0 



3.6 2.8 3.1 1 



.653 .33 1.498 



No. 6, July G to 









Aug. 1 



26.5 20.5 24 

 22 16.6 19 4 



4.4 2.7 3,3.1 

 4.58 3.26 3.9.3 



1.166 .6i3 .792 



Avg. for herd 



.858 483 .107 



This table 



as well as tl 



ie diagrams 



show that a 



county, state or World's Fair test of a cow's milk for 

 one day only, may give a decidedly wrong impression 

 of the cow's capacity for a week, month or year. 



At the last State Fair at Peoria, Sept. 28 to Oct. 2, 

 1891, there were 28 cows tested. These all entered in 

 competition for premiums, offered to cows over and 

 under 3 yrs. old that produced the most butter fat in 

 their milk of one day. 



