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. 



Av. daily yield per cow 



Total 

 solids 



Per 



cent 

 fat 



Feed 

 cost 100 

 lbs. milk 



Feed 



cost 



1 lb. fat 



Gain 

 in live 



wt. 



Daily 

 return 

 over 

 feed 

 cost 



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



Jersey 



Guernsey _ _ 

 Short-horn 



Cents 

 81.3 

 64.2 

 58.5 



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



Jersey 



Guernsey 



Ayrshire 



Short-horn 



Holstein-Friesian 



Polled Jersey 



French Canadian . 



Brown Swiss 



Red Poll 



Dutch Belted 



22.5 

 23.1 

 26.4 

 22.7 

 28.6 

 15.7 

 20.2 

 23.3 

 21.8 

 15.7 



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 dift'erent expositions, the returns from milk and 

 fat over the cost of feed in the dift'erent tests should not be com- 

 pared with one another. 



