1915] 



MERRILL ELECTROLYTIC DETERMINATION OF EXOSMOSIS 



559 



the effect of anesthetics in solution we have seen that the 

 exosmosis is rapid and considerable during the first day or 

 so and then remains stationary, i. e., the curve becomes hori- 



TABLE XI 



EFFECTS OF SALT SOLUTIONS USED SINGLY AND COMBINED WITH ANESTHETICS 



UPON THE EXOSMOSIS FROM THE ROOTS OF PLANTS 



(PLANTS 40 DAYS OLD WHEN TREATED) 



Culture 



no. 



31 

 32 

 33 

 34 



Treatment 



35 

 36 

 37 



N/ 10 MgCI,, 53hrs... 

 N/10NaCl, 53hrs... 



N/10 KC1, 53 hrs 



0.7% ether in HiO, 53 



hrs 



0.7% CHC1, in H,0, 



53 hrs 



38 



39 



0.7% benzol in H 2 0, 

 53 hrs 



N/10 MgCI, and 0.7% 

 ether, 53 hrs 



N/10 MgCt and 0.7% 

 CHC1*, 53 hrs 



40 

 41 

 42 

 43 



44 



45 

 46 and 47 



48 

 49 and 50 



N/10 MgCI, and 0.7% 

 benzol, 53 hrs 



N/10 NaCl and 0.7% 

 ether, 53 hrs 



N/10 NaCl and 0.7% 

 CHC1,, 53 hrs 



N/10 NaCl and 0.7% 

 benzol, 53 hrs 



N/10 KC1 and 0.7% 

 ether, 53 hrs 



N/10 KC1 and 0.7% 

 CHCh, 53 hrs 



N/10 KC1 and 0.7% 

 benzol, 53 hrs 



Control (dist. H 2 re- 

 newed after 53 hrs.) . . . 



Control (dist. H 2 not 

 renewed) 



Control (full nutr. until 

 Nos. 3 1-45 were placed 

 in dist. H.O) 



Conductivity* 



Readings 



After 

 £hr. 



35.4 

 34.4 

 40.8 



10.0 

 12.1 



11.3 

 41.2 



45.5 



44.0 



37.4 



47.5 



49.5 



50.2 



51.7 



49.2 

 10.9 



15. 2f 



12.5 



After 

 42 hrs. 



Increase over dist. H 2 0** 





57.1 

 60.9 

 63.0 



11.6 



36.3 



17.7 



64.7 



57.2 



1st 



|hr. 



49.4 

 59.5 

 62.4 

 56.0 

 76.0 

 65.4 

 55.8 

 11.9 

 15. 5J 



39.0 



29.4 

 28.4 

 34.8 



4.0 



6.1 



5.3 



35.2 



39.5 



38.0 



31.4 



41.5 



43.5 



44.2 



45.7 



43.2 

 4.9 



9.2§ 



6.5 



Next 

 41 J hrs 



Total in 

 42 hrs. 





21.7 



26.5 

 22.2 



1.6 

 24.2 



6.4 

 23.5 

 11.7 



5.4 

 22.1 

 14.9 



6.5 

 25.8 

 13.7 



6.6 



1.0 

 .3 



26.5 



51.1 

 54.9 

 57.0 



5.6 



30.3 



11.7 



58.7 



51.2 



43.4 



53.5 



56.4 



50.0 



70.0 



59.4 



49.8 



5.9 



9.5|| 



33.0 



* All readings represent values of x on the Wheatstone bridge with a resistance 

 in the box of 9,110 ohms. 



**The average reading of the distilled water before placing roots in it was 

 approximately 6.0. 



t After 53 hours. J After 95 hours. \ In 53 hours. II In 95 hours. 



zontal. We can therefore safely infer that such was the 



here, except possibly in the 



treated cultures in which 



roots and tops showed no effect whatever from the treat 



