550 



ANNALS OF THE MISSOURI BOTANICAL GARDEN 



[Vol. 2 



95 



90 



85 



80 



75 



70 



0) 



J? 65 

 £60 



O 



m 



g 55 

 * 50 



§45 



40 



> 



35 



30 



25 



20 



15 



10 



5 



1 



2 



3 



4 

 Days 



5 



6 



7 



8 



Fig 14 Conductivity curves of cultures (series 15) in distilled 

 water subsequent to treatment, as follows: No. 28, 1 per cent ethyl 

 alcohol in water, to end of experiment; No. 29, 1 per cent methyl 

 'alcohol in water, to end of experiment; No. 30, 1 per cent chloral 

 hydrate in water, to end of experiment; No. 31, 1 per cent benzol in 

 water to end of experiment; No. 32, 1 per cent ethyl acetate in water 

 to end of experiment; No. 33, 1 per cent toluene in water, to end of 

 experiment; No. 34, 1 per cent benzaldehyde in water to end of ex- 

 periment: No. 35, control— placed directly into distilled water; No. 36, 

 1 tier cent methyl alcohol in water, to end of experiment. The plants 

 were 38 days old at the time of treatment. The first reading was taken 

 in all cases after the roots had been in the distilled water containin 

 the anesthetic exactly 30 minutes. The control, however was expose 

 to the distilled water only, the first reading being taken after 30 



minutes. 



