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EXPERIMENTAL PHARMACOLOGY 



should weigh about eight or ten kilograms. Some dogs 

 are considerably more susceptible to the drug than others. 

 One student holds the animal between his knees and 

 reaches forward to grasp the dog around the nose and 

 mouth with both hands firmly. The assistant slips a gag 

 (Fig. 218) into the dog's mouth just behind the eye teeth. 



Fig. 217. Method of administering medicine to a dog by means of a stomach tube. 



The mouth is now held closed and this prevents the dog 

 from biting or dropping out the gag, A second assistant 

 should hold the dog's feet to keep it from scratching. 

 Sometimes the hind feet must be held also. An ordinary 

 soft rubber stomach tube (or one-fourth inch rubber tube 

 with a pointed end) is now passed through the hole in 



