Holstein-Friesians 147 



ahead of the second cow producing 18 pounds 

 in the same time, yet the second cow would 

 be expending 50 per cent, more energy than 

 the first cow. Admission to the Advanced 

 Registry is so arranged as to facilitate the 

 production of cases like this, and as there is 

 no means of knowing how many there are of 

 them, any comparison between the amount 

 of butter fat produced by different cows and 

 the ages of their dams would be wholly 

 uncertain. 



In examining setters we found that the 

 fact of recent importation made it impossible 

 to find four generations of old sires because, 

 before we reached that far back in pedigrees, 

 we found a time when there were not enough 

 animals in existence in the country to complete 

 a pedigree without including the offspring 

 of young sires. The same thing existed, in a 

 more pronounced way, in Holstein-Friesian 

 cattle at the time the investigation was made 

 in 1906. The foundation stock of these ani- 

 mals was imported shortly before 1890, and 

 there was not time enough for the existence 



