Equilibrium in the Intake of Salts by Plant Cells. 



455 



The results obtained with potato are similar. Curves showing the action 

 of copper sulphate on this tissue as well as on the roots of living bean plants 

 are given in an earlier paper by Stiles and Jorgensen (11). They are similar 



to those given here for carrot. 



Table V. — Carrot in Copper Sulphate of Various C!oncentrations. 







Increase in electrical conductivity. 





Time in 

 hours. 













Distilled 

 water. 



N/5000. 



N/1000. 



N/oOO. 



N/50. 



1-5 

 18 -0 

 43 -5 



+ 26 

 + 75 

 + 121 



+ 37 

 + 66 



+ 997 



+ 61 

 + 473 

 + 1139 



+ 81 

 + 674 

 + 1394 



+ 102 

 + 810 

 + 833 



1500 



z 

 o 



I- 



Z) 



_l 

 o 



_) 



< 1000 



z 



UJ 



I- 



X 

 UJ 



ll. 



o 



> 

 > 



O 500 



D 



Q 



2 



O 



u 



UJ 

 CD 

 Z 

 < 

 X 



o 





N 





/ 500 





/ 





/ PlOOO 





/ / N 





' / /sooo 



N / 



/ .y o 



50 P — 7^ 







o D W 





25 



50 



TIME IN HOURS 



Fig. 3. — Changes in concentration of the external solution when carrot tissue is immersed 

 in copper sulphate solutions of various concentrations. 



* 



