626 PHYSIOLOGY OF RESPIRATION. 



p. 617, may be regarded as protective. When a constriction of the 

 bronchial musculature exists it may be abolished by the paralyzing 

 action of atropin, or temporarily by injections of extracts of 

 lobelia or by the anesthetic effect of inhalations of chloroform or 

 ether. Nicotin also causes a dilatation. 



