48 Dynamic Evolution 



nence of a dynamic development is propor- 

 tional to the length of time involved in its 

 acquirement. 



We may illustrate the concentration of 

 energy by considering a horse being trained 

 as a trotter. During the early part of his 

 training he gains speed rapidly, the amount of 

 gain being represented by the length of time 

 required, in minutes and seconds, for him to 

 trot a mile. This gain in speed is called 

 development, and it is the ordinary but 

 inaccurate practice to represent a horse's 

 development, by his trotting record. A time 

 comes in the training of a horse when no 

 further work will add to his speed. It is then 

 said that he has reached the limit of his 

 development, but a little consideration will 

 show that this is not true. While a horse may 

 not gain in speed by further training, he 

 gains in endurance and can trot a greater 

 distance without exhaustion. As it requires 

 more energy to trot the greater distance, it is 

 evident that the additional work performed 

 has added to his accumulation of energy, 



