40 



BITS AND BRIDLE GEAR. 



chain passing round the lower jaw of the horse. To express 

 the matter scientifically, the curb is a lever of the second 

 order, in which the power is the pull of the reins (4, Fig. 91) ; 

 the weight, the bars of the mouth, against which the mouth- 

 piece presses (i. Fig. 91) ; and the fulcrum the chin-groove 

 (2, Fig. 91), which is the depression at the back of the lower 

 jaw and immediately above the chin, in which the curb-chain 

 should rest. 



Fig. 46. Ordinary Curb 



Side Vitw. 



The names of the different parts of a curb (Fig. 46) are 

 as follows : — 



The curb-chain is attached to the top eyes by means of the 

 curb-chain hooks. 



The chin-strap or lip-strap (Figs. 47 and 48) passes through 



