[Vol. 2 



544 



ANNALS OF THE MISSOURI BOTANICAL GARDEN 



In fig. 11 are shown the results with ether in distilled water 

 and, for comparison, also with ether vapor for the same period. 

 The curves for the ether-treated cultures are closely parallel 

 for the entire period of observation of 15 days, and both are 





TABLE V 







EFFECTS OF VARIOUS ANESTHETICS ON THE EXOSMOSIS FROM 





THE ROOTS OF PLANTS 







(See curves in fig. 12) 









Vapor Treatment, Roots 



Exposed 





Anesthetic 



Time of exposure 



Culture no. 



Resulting 

 exosmosis 



Ether 



30 minutes 



, — — 



3 



( About the 

 •j same in Nos. 

 ( 3 and 5 



Illuminating gas 



15 minutes 



5 



Illuminating gas 



30 minutes 



7 



Higher 



Chloroform 



30 minutes 



9 



Highest 



Treatment with Anesthetics Dissolved in Water 



Ether, 4% 



30 minutes 



4 



High 



Ether, 4% 



Throughout experiment 



11 



Highest 



Ether, 10% 



30 minutes 



12 



Higher 



Illuminating gas- 



15 minutes 



6 



Medium low 



saturated sol' n. 









Illuminating gas- 



30 minutes 



8 



Like control 



saturated sol r n. 









Illuminating gas- 



Throughout experiment 



13 



Medium low 



saturated sol'n. 









Illuminating gas- 



30 minutes 



14 



Slightly above 



saturated sol'n. 







control 



frequently re- 









saturated 









Chloroform, 4% 



30 minutes 



10 



Very high 



Controls 



Roots exposed to t 



he air under a bell jar 30 minutes 



16 



High for con- 

 trol 



Roots exposed to t 



he air under a bell jar 30 minutes 



17 



High for con- 

 trol 



Roots not exposec 



1, but in water from first 



18 



Normal for con- 









trol 



above that of the control. The excretion was nil during the 

 first half hour and at the end of 5 days it was scarcely more, 

 though it may have risen and fallen in the meantime, as no 

 readings were taken in the interim. After 5 days a greater 

 rise in the conductivity curve occurred with the ether-treated 

 cultures than with the control ; no apparent effects, however, 

 were produced on either the tops or roots. 



