Public Tests of Pure-bred Dairy Cows. 



421 



and all kinds of various feeds as it wished to each cow under its 

 care. Full records were kept of everything eaten, of all the milk 

 yielded, the gain or loss in the weight of the cows, etc. A price was 

 further established for milk and fat so that the returns of each cow 

 over the cost of the feed consumed could be credited. The toble 

 which follows shows the results of one test at each exposition con- 

 densed and arranged for comparative study. 



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

 American, and Louisiana-Purchase Expositions. 



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



Pan-American Exposition, Buffalo, 1901: average of 5 cows, 146 days 



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 from milk and 

 fat over the cost of feed in the different tests should not be com- 

 pared with one another. 



