ORAN L. RABER 



543 



100-1 



<iJ 



(0 



.a 



CO 



o 



Fig. 2. Antagonism curves showing the resistance of Laminaria in 1.1 M 

 sodium acetate, in 0.36 M sodium sulfate, and in mixtures of both. Ordinates 

 represent resistance (expressed as per cent of the original resistance in sea water 

 which is taken as 100 per cent) ; abscissae represent volumetric proportions of the 

 two salts. The dotted line connecting the ends of each curve shows the approxi- 

 mate additive effect; the vertical distance of the curve above this dotted line may 

 be regarded as a measure of antagonism. 



