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 
Unregistered stock and scrubs. Unregistered animals are of 
two kinds: first, those that cannot be recorded because their 
Fic. 27. Inferior feeder, $4.75 per hundredweight (1910) ; usual price, 
$2.75 per hundredweight 
From “ Beef Production,” by Mumford 
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 + 183 (see rows ¢ and / of the table). 
