NEED OF MODIFICATION. 91 



In Cha}Dter V it w-ill appear that there are certain lines of racing 

 blood, descended in part from coach or road horse crosses, which, by 

 accident or other means, have been introduced into the progenitors of 

 these families — that all such families have two opposite and contending 

 blood forces in their composition — the one, which is called the racing 

 or galloping inclination and came from the pm'e blood of the Arab or 

 Barb, from which our blood horse is descended ; the other, which is 

 called the trotting inclination or instinct, and wliich comes from 

 elements that have been enured to service on the road and in harness. 

 It sometimes happens that from use or employment a single member 

 or more of one of these families thus constituted, from use and employ- 

 ment at road gaits, displays an aptness or inclination or adaptation 

 for that way of going, and by training and discipline these qualities 

 and traits are so stimulated and encouraged as to result in a trotter 

 of great sviperiority and distinction. Such a result will not, however, 

 be likely to come from a family where no such latent and pre-existmg 

 road impulses have existed, and such cases when they do occur vnW 

 not justify the belief that the great trotter or the agreeable and val- 

 uable roadster can be manufactured from a thoroughbred by dint of 

 education and discipline. Much effort has been made in that direction, 

 but much loss and failure has been experienced. 



