Antitoxic Action of Certain Bases 



141 



TABLE 6. Wheat (Growth during Thirty Days). Quantities Represent Cubic 

 Centimeters of .12 M Solutions 



Culture solution 



Aggregate 

 length of 



roots 



per plant 



(millimeters) 



CaCla. . . . 

 100 CaCh 



10 KCl . 



10 CaCU 

 100 KCl.... / 

 KCl 



85 

 105 



492 

 66 



In the writer's experiments Canada field peas and wheat have both 

 been employed, and in each case the presence of calcium protects the plant 

 from the injurious action of potassium. As measured by the effect on 

 the total green weight, the writer's results show a protective action which 

 is not so marked as that which appears from the data of Osterhout, in 

 which root length alone has been considered. 



TABLE 7. Experiment with Canada Field Pea. Duration, Twenty-Four Days 



Composition of 

 solution 



Green 



Green 



Total 



Average 



Average 



weight 



weight 



green 



length 



length 



of tops 



of roots 



weight 



of tops 



of roots 



(grams) 



(grams) 



(grams) 



(centi- 

 meters) 



(centi- 

 meters) 



6.46 



3.60 



10.06 



14.0 



14.5 



6.60 



3.85 



10.45 



15.0 



15.0 



6.35 



3.95 



10.30 



14.0 



15.0 



5,25 



3.20 



8.45 



12.0 



8.0 



5.00 



2.90 



7.90 



8.8 



12.0 























Inap.* 







Inap.* 



Slight 







1.90 



2.00 



3.90 



6.0 



6.0 



1.70 



1.70 



3.40 



6.0 



6.0 



Remarks 



N/20 CaCU -f N/20 



KCl 



N/20 CaCh + N/50 



KCl 



N/20 CaCl2+N/500 



KCl 



N/500 CaCl2-fN/20 



KCl 



N/20CaCl2 



N/20 KCl 



N/50 KCl 



N/500 KCl 



Distilled water 



Tops dark green 



Tops dark green 



Tops dark green 



Tops light green 

 Tops light green 

 No growth, dead 

 Slight growth, dead 

 Terminal leaves dead 

 Color poor 



* Inappreciable. 



