348 



PHYSIOLOGICAL ACTION OF CONDURANGO. 



Experiment XIV. — Two frogs were suspended by the head, 

 and reflex action tested by applying dilute sulphuric acid 

 (1 part acid in 250 of water) to the feet. 



For greater convenience in comparing the results of these ex- 

 periments I subjoin the mean number of seconds required for 

 reflex action in each of the frogs during the time they were 

 suspended before Condurango was injected into some of them, 

 and the number of seconds required during the time they hung 

 after the injection had been made. 



