52 General Principles of Veterinary Medicine, 



view of displacing the foreign object in the one instance, and 

 of introducing medicines in the fluid state in the stomach 

 under any emergency, a hollow probang may be used. The 

 fluids may also be forced into the stomach by the pumping 

 action of a syringe. 



The probang is guided through the centre of the moutn 

 by a gag. We give the drawing of two forms. Fig. 10 

 is probably the best. 



FIG. 10. — AN OX GAG. 



The advantage it has over the common gag is, that it is 

 tied by a rope to the mouth, and then, in virtue of its shape, 

 it is a more complete guide to the probang than the instru- 

 ment represented at Fig. 10. The latter is the common 

 gag, to be heldnn the animal's mouth by an assistant, whilst 

 the operator uses the probang. 



FIG. 11. — AN OX GAG. 



As the first stomach of ruminants is very capacious and 

 lies flat against the left side of the belly, an expedient has 



