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EXPERIMENTAL PHARMACOLOGY 



recover as much as possible. Give a second dose of adren- 

 aline if necessary. Then empty out the adrenaline (be 

 sure the bull-dog on the vein does not leak) and fill this 

 burette with twenty cubic centimeters of atropine solution 

 (one cubic centimeter equals one milligram.) 



Fig. 252. Tracing showing the action of a fatal dose of barium chloride on uterine con- 

 tractions, blood-pressure and respiration. 



Get the animal into as good condition as possible and 

 then inject one cubic centimeter (or one and one-half cubic 

 centimeters) of arecoline. Wait for the action of the drug to 

 become well developed and then inject one cubic centimeter 

 of atropine. Wait for this to be carried to the heart. What 



