244 ILLINOIS STATE DAIRYMEN'S ASSOCIATION. 



highest average for each oow is. during the shorter period. The study of 

 these tables seemis' to show that the comsititution of milk varies wltb the 

 lengfth of the milking period, unless it may be late^r shown that the day 

 time is more favorable for milk production thani is the night, a contingen- 

 cy that ha& not yet been suggested by experiments at this station, as 

 Sihown by a careful study of the following table: 



Table 10. Yields of evening milkings when the correspondin? 

 morning milkings are taken at 100, and the periods between milking are 

 equal. 



Milk Fat Solids not fat 



March April March April March April 



Lady Pietertje 39 100 102 106 96 97 



Eva 101 100 96 92 100 99 



Rose 9o 100 89 103 95 99 



The above is taken from another experiment now in progress and 

 exhibits several remarkable facts. During the month of March Eva 

 gave more milk in the evening than in the morning, but the other two 

 gave less. In April the yield of all was the same morning and evening. 

 Lady Pietertje for both months gave more fat in the evening milking, 

 but the others gave less, excepting Rose in April, leaving the evidence 

 divided. Regarding solids not fat, they all gave less at night than in 

 the morning, excepting in March. Differences exhibited in this table 

 are apparently slight, but being averages should be significant. They 

 are arranged upon opposite sides of the question, and yet the differences 

 in favor of the morning milking are greater than those in favor of the 

 evening. 



OOMPOSITION OF FIRST AND LAST MELK DRAWN. 



A num'ber of tests were made of the same and of different cows in or- 

 der to discover the difference, if any, between the first pint of milk drawn- 

 from the udder and the pint last drawn. The average per cent, of fat in 

 the mdlk of each cow for a number of days before andnalter the trial isi 

 s-hown in the table for the sake of comparison. )Th© udders were washed 



