444 Dandeno — Relation of Mass Action to Toxicity. 



VI. KOH. 





n/64 



n/128 



n/256 





n/512 







A 



B 



c 



D 



A 



B 



C 



D 



A 

 4 



B 



8 



C 

 11 



D 

 4 



A 

 25 



B 



C 

 15 



D 



Pea 



12 



Lupine 











4 



8 



11 



8 



25 





12 



13 











Corn 



1 



^2 



6 



4 



25 





13 



11 



















VII. NaOH. 





ix/64 



n/128 



n/256 







A 



B 



C 



D 







A 

 3 



B 



8 



C 



1 



D 



8 



A 



25 



B 



C 



8 



D 

 12 



— 









Pea 





Lupine 



1 



91 



3 



10 



25 





9 



6 



25 





12 



10 











Corn 



Z 2 



5 



12 



15 



25 





19 



16 



25 





16 



12 











VIII. Na 2 C0 3 . 





n/32 



n/64 



w/128 





n/256 







A 



B 



C 



D 



A 



B 



C 



D 



A 



B 



C 



D 



A 

 12 



B 

 25 



C 

 10 



D 



Pea 



7 



Lupine 



















8 



20 



10 



5 



25 





8 



9 



Corn 



• 









12 



20 



10 



5 



20 



25 



8 



3 



25 





6 



4 



IX. NaHCO, 





n/8 



n/16 



n/32 



n/64 







A 



B 



C 



D 



A 

 3 



B 



8 



C 

 3 



D 



2 



A 



8 



B 

 12 



C 



1 



D 

 11 



A 

 12 



B 

 20 



C 

 3 



D 



Pea 



6 



Lupine 











20 



25 



4 



5 



25 





5 



6 



25 





13 



35 



Corn 



1 



H 



3 



8 



25 





7 



6 



25 





9 



20 



25 





12 



42 



During the course of many of the experiments made with 

 radicles immersed in solution, certain phenomena seemed to 

 indicate that the action which took place between the substance 

 in solution and the radicle was chemical in its nature. Con- 

 sequently, experiments were made to ascertain, if possible, how 

 much reaction the radicle might produce if allowed to react 

 upon the solution for a given time. Two of these experiments 

 are here recorded, one of them employing HCl,?i/1024 and 

 the other H 2 SO 4 ,^/1024. In both cases corn seedlings were 

 used. In column 1 is given the volume of solution used in 

 each case ; in column 2 is given the growth in millimeters of 

 the radicles during twenty-four hours; then these seedlings 



