CURBS. 



47 



revolving wheel might not be attended with good results 

 in some cases ; but the presence of the iron ring and the 

 great height of the port (about 3 inches in the bit from 

 which I have taken these photographs), render this bit 



Fig. 61. Mamluke Bit. 



Fig. 62. Jointed Pelham. 



entirely unsuitable for use. The undue height of the port 

 causes the metal ring to have an excessive tendency to mount 

 up on the branches of the lower jaw. The rings to which the 

 reins are fixed, are attached to the bit by swivels, 



