84 Dynamic Evolution 



sires reproduce, and averaging the same as 

 they average in ordinary breeding operations. 

 In this we have nothing to indicate any un- 

 usual accumulations of energy in the sires 

 before reproducing, but divide these trotters 

 into groups of stallions, mares, and geldings 

 so that we can consider the sires of each 

 individually, and we immediately get indica- 

 tions of an accumulation of energy accom- 

 panied by an indication that an accumulation 

 located after sexual maturity is sexual in 

 character and is transmitted in accordance 

 with the laws governing the transmission of 

 secondary sexual characters. The sires of 

 stallions are older than the sires of either 

 mares or geldings. Also, 77 per cent, of the 

 sires of stallions have race records, while 

 only 62 per cent, of the sires of mares and 

 geldings have race records. 



The reader will probably jump to the con- 

 clusion that the sires with records are the old 

 sires, and that the sires without records are 

 the young sires, and he will probably recall 

 what was previously said about the ages of 



