s 



BULL-HOLDERS AND LEADERS. 



transverse pieces may be altered by means of a screw. Brogniez's 

 gag has a semicircular bar, which connects the horizontal branches 



Fig. 8.— Bull-holder. 



Fig. y.— Bull-huldoi 



resting in the interdental space of the upper and lower jaws 

 respectively, and which may be moved to either side. This gag 

 has the disadvantage of requiring to be very strongly, and, therefore, 



Fig/ 10.— Nose-ring for bull. 



Fig. 11. Fig. 12. 

 Bull-leaders. 



heavily made, though it certainly leaves the mouth very clear for 

 operation. Mackel's gag is lighter, and does not require to be fixed 



