SYSTEMATIC IMPROVEMENT OF ANIMALS 185 



The breeder, on the other hand, is concerned with the offspring, 

 and he will stake his fortunes with the best bred ancestors, not 

 because all their descendants will be equally good, but because 

 the proportion will be higher. 1 



Unregistered stock and scrubs. Unregistered animals are of 

 two kinds : first, those that cannot be recorded because their 



Fig. 27. Inferior feeder, $4.75 per hundredweight (1910) 

 $2.75 per hundredweight 



From " Beef Production," by Mumford 



usual price, 



ancestry is exceedingly mixed, — known as scrubs ; and, second, 

 those that are really pure in their blood lines but that cannot be 

 recorded because the records are lost, or, for other reasons, their 

 particular ancestry is not fully known. These are called simply 

 unregistered. 



1 A glance at the table in question will show that while tall people spring 

 both from tall and from mediocre parents, the greatest proportion is from the 

 tall parents ; thus 4 -±- 19 > 5 -f- 183 (see rows e and/ of the table). 



