7 THE BUSINESS OF DAIRYING 



age daily amounts of fat produced by the cows, we 

 note that the Holstein-Friesian cows lead the list 

 with an average production of 1.61 pounds of fat. 

 The other breeds follow in this order: Guernsey 

 and Brown Swiss, 1.41 pounds of butter fat; Jersey, 

 1.26 pounds; Shorthorn, 1.14 pounds; French Cana- 

 dian, i. 08 pounds; Ayrshire and Polled Jersey, 1.07 

 pounds; Red Polled, 1.02 pounds, etc. 



The data obtained for the Holstein-Friesian cows 

 differs somewhat in their character from those for 

 cows of the other breeds from the fact that the Hoi- 

 stein tests in a large majority of cases were of short 

 duration, i.e., mostly seven days, and were con- 

 ducted under a more or less forced system of feed- 

 ing. The large number of animals contributing to 

 the average data for this breed renders the figures 

 valuable as an expression of the average quality of 

 milk of American Holsteins and their production of 

 milk and butter fat at this time. The latter figures 

 may be considered maximum when the performance 

 of a large number of animals is summarized. The 

 data given in the column headed "Per cent, of fat" 

 represent, as we believe, very accurately the aver- 

 age quality of milk produced by purebred cows of 

 the different dairy breeds in this country at the pres- 

 ent time. 



