ADRENALINE (EPINEPHRIN, ADRENINE) 105 



aim at making this time equal for both of a pair of eyes. In a recent 

 article on the estimation of adrenaline in the blood, Gottlieb and 

 O'Connor [1912] place the blood-pressure method first in point of 

 accuracy, provided the adrenaline solution is sufficiently concentrated. 

 Next comes the perfusion of the frog's blood vessels, which may be 

 used quantitatively and is more sensitive (up to I : 30,000,000). For 

 the qualitative recognition of the minutest quantities the inhibition of 

 the cat's small intestine is very specific and, in particular, it is not pro- 

 duced by serum (limit I : 400,000,000). 



