Equilibrium in the Intake of Salts by Plant Cells. 465 



Beet in 0'4 per cent, calcium chloride. 



Tliickness of 

 tissue. 



Kation. 



Anion. 



After t^vro days. After four days. 



After two days. After four days. 



3 mm. 

 1 mm. 



-2582 -3266 

 -3421 ; -5616 



-0354 -0486 

 -0522 -0826 



i 



Exosmosis into Distilled Water after Immersion in Salt Solutions. 



At the end of the experiments already recorded, the solutions were 

 removed, the discs washed for a few minutes in distilled water, and then 

 immersed in 100 c.c. of distilled water. Table XIII will serve as an example 

 of the course of the exosmosis which results. 



Table XIII. — Exosmosis into Distilled Water from Discs previously Immersed 

 in various Concentrations of Sodium Chloride. (Einsed quickly, once 

 with tap water and once with distilled water.) 





Increase in electrical coiiductiTity when previous solution was — 



Time in 

 hours. 













Distilled 

 water. 



N/SOOO. 



N/500. 



N/50. 



N/10. 



0-08 

 -25 

 18-00 

 23 

 41 -0 

 64 -0 



22 

 28 

 64 

 47 

 47 

 55 



22 

 27 

 64 

 46 

 48 

 54 



26 

 34 

 87 

 71 

 59 

 57 



42 

 56 

 203 

 198 

 178 

 154 



106 

 163 

 664 

 647 

 580 



The results show in all cases that the greater the concentration of salt in 

 which the tissue is immersed the greater the exosmosis from the tissue on 

 subsequent immersion in distilled water. Also, the amount of exosmosis does 

 not increase to a constant and remain stationary, but after reaching a 

 maxinuim value it slowly decreases as if electrolytes had re-entered the tissue. 

 This phenomenon will be dealt with in a later communication. 



In general, the results in regard to this exosmosis into distilled water 

 corroborate the conclusions previously drawn as to the inHuence of concen- 

 tration on the absorption ratio, for a similar relation is found after exosmosis 

 into distilled water between external concentration and internal concentra- 

 tion, as after intake of salt. 



