148 



Scientific Proceedings (119). 



case of the ethyl, w-butyl and iso-amyl ethers to a more gradual 

 and more prolonged fall after the acetyl, benzoyl and dibenzoyl 

 esters. The benzyl ether caused a sudden and more prolonged 

 fall, which lasted four to five minutes. Control emulsions, 

 injected at the same slow rate, gave no effect whatever. Perfusion 

 of the frog's circulatory system gave a marked vaso constrictor 

 effect, in striking contrast to the vasodilation obtained with 

 emulsions of saligenin and benzyl benzoate. This constriction 

 is probably due to irritation of the arterial walls. 



