324 



EXPERIMENTAL PHARMACOLOGY 



the turtle! Do you have any evidence that these structures 

 exist in the turtle? 



As soon as the curve returns to normal prepare to in- 



Fig. 284. Turtle lung tracing showing the action of lobeline. 



Fig. 285. Turtle lung tracing showing the action of lobeline. 



ject piloearpine (one cubic centimeter equals one-half mil- 

 ligram). The heart may not be beating very strongly and 

 if this is the case it may be advisable to wait a few minutes 

 for the heart to recover. A few drops of a dilute (1 :10,000) 



