198 Dynamic Evolution 



know from what progenitors these champions 

 were produced? The statement that improve- 

 ment comes through selection does not have 

 quite the same meaning for trotters that it has 

 for other animals. With trotters it almost 

 invariably means the selection of the blood of 

 a horse which is dead and which was consid- 

 ered of little value for breeding purposes when 

 alive. 



An industrious statistician traced all of the 

 standard trotters to their tail-male ancestors 

 born before 1850, and found that they came 

 from one or another of no more than seventeen 

 horses having different origins. Condensed, his 

 table is as follows : 



All Trotters Descended in Tail-Male from 



Hambletonian 15.450 trotters 



Mambrino Chief i.°45 trotters 



Justin Morgan 975 trotters 



Andrew Jackson (Clay family) 840 trotters 



Miscellaneous (13 horses) 687 trotters 



Unknown 3.241 trotters 



Trotters at end of 1906 22,238 trotters 



A similar tabulation for the 2 : 10 trotters 

 involved in our investigation yields the following 

 result: 



