Equilibrium in the Intake of Salts by Plant Cells. 463 



Table X, — Eatio of Ion Concentration Inside Tissue to that Outside after 

 Intake of Salt. (Data from Meurer.) 



Bait, 



Duration or 

 experiment in 

 days. 



Concentration of 

 external solution. 



Absorpt 

 Kalion. 



on ratio. 

 Anion. 



K.SO4 



4 



N/17 -5 



0-402 





KNO, 



4 



N/20 



0-524 



0-570 



NaNO, 



4 



N/17 





0-340 



ECl 



2 



N/15 



0-374 



0-287 





4 



N/15 



-548 



0-386 



NaCl 



2 



N/12 



0-411 



0-258 





4 



N/12 



489 



0-307 



CaClj 



2 



N/14 



0-270 



-229 





4 



N/14 



-283 



-270 





2 



N/70 



0-745 



-552 





4 



N/70 



0-846 



0-852 



distribution between strong solution and tissue appears as a property of 

 living tissue in contrast to dead tissue, just as does the heaping up of salt 

 absorbed from weak solutions. 



Table XI. — Absorption of Magnesium Chloride by Living and Dead Tissue of 

 Carrot. (Data from Meurer.) 







Absorption ratios. 



Concentration 

 of external 

 solution initially. 



State of 

 tissue. 



After two days. 



After four days. 





Kation. 



Anion. 



Katiou. 



Anion. 



N/24 

 N/22 

 N/95 

 N/105 



Living 

 Dead 



Living 

 Dead 



-327 

 0-958 

 -563 



0-336 



0-774 

 0-950 



0-286 

 0-9.i3 

 0-577 



0-377 

 -953 

 0-895 

 869 



When we compare Meurer's resiilts with our own, it is to be observed that 

 just as in the case of Nathansohn's work, the figures show distinctly that 

 there is a greater absorption relative to the concentration with decreasing 

 concentration of the external solution. Thus, with decrease in concentration 

 from N/24 to N/95 in the case of magnesium chloride, the concentration of 

 magnesium in the tissue relative to that outside rises, with an immersion time 

 of 4 days in each ease, from 0-336 to 0-774. Similarly, with calcium chloride, 

 decreasing the concentration from N/14 to N/70 increases the absorption 

 ratio for calcium from 0'282 to 0'846 after the same period of immersion, 



VOL. xc. — B. 2 



