286 THE BREEDS OF LIV E-STOCK 
period of seven consecutive days have now been made. 
These tests are annually classified according to the age of 
the cows at date of calving. A summary of such records 
for a single year will serve to show the butter-making 
possibilities of the élite of the breed. During the fiscal 
year 1914-15, 3115 full-aged cows averaged: milk, 475.8 
pounds; butter-fat, 16,947 pounds. Six hundred and 
sixty-one senior four-year-olds averaged: milk, 453.6 
pounds; butter-fat, 16.405 pounds. Nine hundred and 
twenty-elght junior four-year-olds averaged: milk, 444 
pounds; butter-fat, 16.076 pounds. Nine hundred and 
fifty-five senior three-year-olds averaged: milk, 419.4 
pounds; butter-fat, 14.865 pounds. One thousand two 
hundred and three junior three-year-olds averaged: milk, 
398.7 pounds; butter-fat, 14.194 pounds. One thousand 
one hundred and two senior two-year-olds averaged : milk, 
360.1 pounds; butter-fat, 12.603 pounds. Two thousand 
seven hundred and seventy-nine junior two-year-olds 
averaged: milk, 324.1 pounds; butter-fat, 11.434 pounds. 
Two thousand six hundred and twenty-five cows of the 
breed have official records greater than 20 pounds of 
butter-fat in seven days, and one thousand and eighty- 
four cows of the breed have official records greater than 
80 pounds of butter-fat in thirty days. Such records are 
usually made at ten to fifty days after parturition. A 
lapse of at least five days is required. There can be no 
doubt as to the correctness of these records. In many 
cases, especially when the yield was exceptionally large, 
the cows were re-tested for periods ranging from twenty- 
four to forty-eight hours by representatives of the experi- 
ment stations, who kept constant watch in order that no 
milk or cream should be introduced into the udders sur- 
reptitiously. 
