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 View. 



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

 as follows : 



ad and hi 



ab and hi 



bd and il 



bi 



efg 



be and gi 



c and k 



a and h 



d and 1 



b and i 



m, m 



Cheek. 



Upper end of cheek. 



Lower end of cheek. 



Mouth-piece. 



Port. 



Keel or cannon. 



Chin-strap rings. 



Top eyes. 



Loose rings. 



Butts. 



Curb-chain hooks. 



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 



