JUM 10 
] OSTERHOUT—BEHAVIOR OF SODIUM AND POTASS 3 
1909 
i imilarity. As 
protective effects sodium and potassium show great similarity 
i iti ts, we 
this does not seem to be the case in the field of nutritive effects, 
500 _ 
mm. 
1, vs. 
i -X-x-) and CaC 2 
Fic. 4.—Antagonism curve, CaCl, vs. KCl (upper ie sei al growth of 
NaCl (lower curve 0-0-0). Each ordinate repress ite the corresponding 
Wheat jroots in a solution whose composition is given Oppost 
letter in table IV 
