54 Dynamic Evolution 



ary character by reason of being accumulated 

 before sexual maturity, and that which may 

 be a secondary sexual character by reason of 

 being accumulated during the adult stage. 

 If there is a considerable accumulation 

 which may possibly be secondary sexual, 

 we look to the early activity of the sire 

 (this grandsire's son) to see if that activ- 

 ity was of a kind that might transform a 

 secondary sexual character into an ordi- 

 nary one. If so, we add it to the in- 

 heritance of the mare or gelding. If not, we 

 omit it. 



Having due regard for the relationship of 

 the sexes and the possible existence of second- 

 ary sexual characters, we examine the grand- 

 dams in the same way that we examine the 

 grandsires. If the trotter is a mare, the 

 two granddams stand on the same footing 

 as the dam of a mare. If the trotter is a 

 stallion or a gelding, the paternal grand- 

 dam is cut off at three years of age, and 

 the maternal granddam is cut off or ex- 

 tended to actual age of reproduction accord- 



