PILOCARPIXE AXD TRIMETHYLAMINE 



341 



for saliva, the pupils for change in size, and the respira- 

 tory movements for difficulty in expiration or inspiration. 

 At once inject one cubic centimeter of hyoscine (for a dog. 



Fig. 297. Tracing showing the action of pilocarpine and trimethylamine on the 

 bronchioles and blood-pressure in a spinal dog. Record made according to the method 

 described in Experiment XXIX. 



one-half cubic centimeter for a cat or rabbit) and observe 

 the effects. What conclusions can you drawl Atropine or 

 hvoscyamine mav be substituted for the hvoscine. How 



/ / ' / 



does the action of eserine compare with that of pilocarpine 



