222 KANSAS UNIVERSITY SCIENCE BULLETIN. 



ing nearly constant for several doses, the size of the dose 

 thereafter making but little difference. (The solutions used 

 were: 1 :100,000, 1 :60,000, 1 :30,000, and 1 :10,000.) The rise 

 in pressure lasted considerably longer than in the cat, and 

 there w^as no after depression as in the cat, due, as was proved 

 later, to impurities in the Parke-Davis adrenalin. But the 

 peculiar decrease in susceptibility to the drug rendered it im- 

 possible to determine with any degree of accuracy the strength 

 of adrenalin used, or in the other part of the research, to ascer- 

 tain the effect of the salts upon adrenalin pressure. 



This work was done at the suggestion of Doctor Hyde, to 

 whom my best thanks are due for her valuable advice and help. 



