ACTION OF THE CURB. 



199 



the reins of the curb are drawn tight, exerted in the 

 manner shown by arrowheads in Fig. 24 : 



Fig. 24. 



(i) By the mouthpiece on the bars of the lower jaw, 

 and on the tongue. 



(2) On the chin groove. 



(3) On the poll of the horse's head, over which the 

 headstall passes. 



(4) The pull of the reins. 



If we refer to page 188, we will see that the pressure 



