Testing Milk on the Farm. 147 



per day as a 5 per cent. -cow, and will therefore produce 

 considerably more butter fat. The point whether or not 

 a cow is a persistent milker is also of primary import- 

 ance; a production of 300 Ibs. of butter fat during a 

 whole period of lactation is a rather high dairy standard, 

 but one reached by many herds, even as the average for 

 all mature cows in the herd. It should be remembered 

 that a high production of butter fat in the course of the 

 whole period of lactation is of more importance than a 

 very high test. 



