EDITH PHILIP SMITH 



161 



of respiration. The significance of these results seemed to be doubt- 

 ful, and no emphasis was laid on them. The present experiments on 

 plants, therefore, indicate that this preliminary depression may be 



Rate of CO2 production 

 220%f 



In distilled water 



In ether 3.05% 



75 



150 rains. 



Fig. 2. Curves showing recovery from exposure to ether. Normal rate as in 

 Fig. 1. The solid line represents respiration in ether; the broken line, respiration 

 in distilled water. The points marked X on the curve indicate points of removal 

 from ether. The curve represents the mean of six experiments (probable error 

 of the mean, less than 5 per cent of the mean). 



of general occurrence. In that case their importance is evident, 

 and must be reckoned with in any attempt at a general theory of 

 anesthesia. 



