PITUITRIX, ADREXALIXE, ATROPIXE 



391 



EXPERIMENT CXIV. 



Pituitary Extract, Adrenaline, Atropine, Barium. (Dog: 



Bronchial Contraction.) 



1. By one of the methods previously used arrange a dog 

 for recording bronchial contractions. When all adjust- 

 ments are made stimulate the vagus nerves and see how the 



Fig. 323. Tracing showing the action of pituitrin on the bronchioles and blood-pressure 



in a spinal dog. 



bronchioles react, then inject two cubic centimeters (dog- 

 eight to ten kilos) of pituitrin solution (1 to 5). Do you 

 get a satisfactory record"? What is the action of pituitary 

 extract on the bronchioles? Is this a muscular or nervous 

 affair? "What action has pituitrin on the sympathetic 

 nervous system? How does this compare with adrenaline 

 and tvramine? 



