340 



EXPERIMENTAL PHARMACOLOGY 



the eserine intestinal reaction affected by adrenaline? 

 What structures are involved and how are they affected? 

 What is the innervation of the intestine ? Would it be ad- 

 visable for a physician to understand this innervation? 

 How could he best learn the nervous control of the intes- 

 tinal movements? 



Fig. 296. Tracing showing the action of trimethylamine on the bronchioles and 

 blood-pressure of a spinal dog. The bronchioles were in a state of moderate contrac- 

 tion from the effects of a dose of pilocarpine at the beginning of the tracing. Record 

 made by aspiration of the chest. (See Experiment LXX.) 



Wait till the animal returns to normal. Take another 

 starting record and inject a second dose of physostigmine. 

 You can estimate the correct size of this dose from the re- 

 sults of your first injection. When the action of the drug 

 becomes marked on the animal quickly observe the mouth 



