416 



FEEDS AND FEEDING 



From the vast accumulation of data gathered during these tests the 

 following table has been compiled, giving some of the more striking and 

 helpful findings. 12 



Summary of principal tests of pure-bred dairy cows at the Columbian, 

 Pan-American, and Louisiana-Purchase Expositions 



Columbian Exposition, Chicago, 1893: best cow in 90-day test 



Louisiana-Purchase Exposition, St. Louis, 1904: best and poorest cow, 120 days 



Since widely different prices were charged for feed and allowed for 

 products at the different expositions, the returns over cost of feed in 

 the different tests should not be compared with one another. 



III. FEEDING Cows ON OFFICIAL TEST 



673. Official testing of dairy cows. Of far-reaching importance in the 

 rapid development of the dairy industry in this country have been the 

 advanced registry systems established by the various dairy breed asso- 



"Data for Columbian Exposition test from the Jersey Bulletin, 1893, and 

 the Journal of the British Dairy Farmers' Association, 1894; for the Pan-American 

 test, from the Holstein-Friesian Register, October, 1901; and for the Louisiana- 

 Purchase Exposition, from Dairy Cow Demonstration, Farrington, published by 

 Hoard's Dairyman. 



