﻿BOTANICAL GAZETTE 



The permeability may be regarded as equal to the conductivity, 

 or, for convenience, as equal to the conductance. Hence the per- 

 meability at the start was 1-^750=0.001333. After treatment 



TABLE II 



900. 



OHMS 



800. 



with ether it was : 

 ability was 0.001333 



The decrease in perme- 

 \4, or 13 per cent. 

 In order to see how the evaporation of the ether from the 

 solution influenced the result, another experiment was performed 

 in which the solution was renewed 

 every 5 minutes during the first 60 

 minutes, and thereafter every 15 

 minutes. In this way the concen- 

 tration of ether was kept more 

 nearly constant. It was then found 

 that the resistance rose as before, 

 but did not fall during the first 80 

 minutes, and after this fell very 

 slowly, so that after 300 minutes it 

 was still 80 ohms above that of the 

 control. At this point the experi- 

 ment was discontinued. The re- 

 sults are shown in table II and fig. 2. 

 whether the effect of the anesthetic could be 

 was kept in sea water containing 



In order to se< 

 quickly reversed, 

 0.099 M ether for 50 minutes (the solution being renewed every 



