52 Dynamic Evolution 



condition we examine the history of his ac- 

 tivities and his idlenesses, their sequences, the 

 lengths of time during which each occurred, 

 and the relationship of those occurrences to 

 the stopping point at which dynamic con- 

 dition is to be determined. If we know what 

 have been the normal activities of stallions 

 in breeding establishments up to the average 

 stopping point, we have a fair mental concep- 

 tion of what this dynamic condition is as 

 compared to the average dynamic condition 

 of sires. We are able to say whether the 

 paternal concentration of energy is positive, 

 or negative, or neutral. If it is a pedigree of 

 a 2 : 10 trotter that we are examining, theory 

 demands that the concentration shall not be 

 negative. If the trotter is a 2 : 10 stallion, it 

 will be negative if the sire is as young and as 

 lacking in training as is frequently found in 

 the sires of 2 : io mares and 2 : io geldings. 

 In the case of the dam of a 2 : io mare, we 

 look for the dynamic condition of the dam as 

 it existed just before reproduction. If the 

 trotter is a stallion or a gelding, we look for 



