1918] Waynict: Antagonism and Cell Permeability 167 



NOTE 



The following key applies to all the graphs. The numbers on the abscissas 

 represent both the actual weight of tops and roots and percentages of calcium 

 and magnesium, or of iron, when the latter were plotted. The numbers on the 

 ordinates correspond to the number of cultures as given in the table on the 

 opposite page. The heavy lines always refer to the roots, the light lines to 

 the tops. 



The following type lines are used: 



(Solid line) Weight of tops. 



(Short dashes) Weight of roots. 



(Long dashes) Percentage of calcium. 



(One long and two short dashes) Percentage of magnesium. 



(One long and one short dash) Percentage of iron. 



The numbers given in the "Explanation of Plates" Always refer to the 

 plants arranged in order from left to right, the control being on the extreme 

 right in every case. 



