ANTAGONISM 



157 



It might be thought that the number of constants is 

 sufficient to make it possible to fit any sort of experimen- 

 tal curve and that the consequent agreement between 

 observed and calculated results is less significant than 

 would otherwise be the case. But, as a matter of fact, 



160i 



1OO 



1OOO 



2OOO 

 MINUTES 



FIG. 70. Curves showing the net electrical resistance (curve which ascends and descends) 

 of Laminaria agardhii in a mixture containing 38 mols of NaCl to 62 mols of CaCl?, and re- 

 covery in sea water (descending curves). The figure attached to each recovery curve denotes 

 the time of exposure to the toxic solution. In the recovery curves, the experimental results 

 are shown by the broken lines, the calculated results by the unbroken lines. The observed 

 points represent the average of six or more experiments. Probable error of the mean less 



than 10% of the mean. 



the constants are so related to each other and to the salt 

 compound, Na 4 XCa that the whole set of curves fits into 

 a consistent scheme,^ so that when the constants are 

 determined for any two mixtures the theoretical curves 

 f gr all the other mixtures are thereby fixed. Under these 

 circumstances the close agreement in the six different 

 mixtures (ranging from 1.41 to 62.0% CaCl 2 ) seems to 

 be significant. 



