264 



THE BREEDS OF LIVE-STOCK 



each with the same number of cows, selected in the same 

 manner, and under like conditions, it is that in the eleven 

 years between these tests the Jerseys had increased largely 

 in flow of milk, and in the production of butter. 



The records of the Jerseys in the ninety-day test at the 

 World's Columbian Exposition at Chicago, June-August 

 29, 1893, give the following summary of results for the 

 twenty-five cows entered : 



Most of the cows had been in milk one to three months 

 and one at least five months prior to the beginning of the 

 test. 



The records of the Jerseys in the 120-day cow-demon- 

 stration test at the Louisiana Purchase Exposition at St. 

 Louis, June 16 -October 13, 1904, give the following 

 summary of results for the twenty-five cows entered : 



The cows averaged sixty-nine days in lactation at the 

 time the demonstration began, so in reality at the close 

 of the test, the cows, on an average, had been in milk 



