ANTAGONISM 



147 



It has been pointed out by the writer 9 that while va- 

 riations in concentration affect the form of the antagonism 

 curve, they do not in general affect the proportions which 

 are most favorable for life processes. 



It is therefore evident that if we wish to preserve the 

 favorable character of a mixture when the concentration 



TABLE XI. 



Amount of Na^XCa. 



of any antagonistic substance is increased we must at 

 the same time increase the concentration of the others 

 in the same proportion. 



In discussing the results of his experiments on ani- 

 mals, Loeb 10 states that the law of direct proportionality, 

 found in such cases is in reality Weber's law. 11 In 

 regard to the significance of this, Loeb says : 



1 1 Since this law underlies many phenomena of stimu- 

 lation, if appears possible that changes in the concentra- 

 tion of antagonistic ions or salts are the means by which 



9 See page 135. 



10 Loeb, J. (1915, /I). 



11 Cf. Osterhout (1916, C}. 



