244 



ELECTROCHEMISTRY 



Investigating the similar relations which obtain in solutions 

 containing different percentages of casein we find that the rela- 

 tion between X and 61 for all of the concentrations of casein in- 

 vestigated can be represented by the more general formula : 



X X 10^ = abi-^h^-yC, 



(vii) 



where C is the percentage of casein and a, 13 and 7 are constants, 

 the values of which we have already determined for 1 per cent 

 casein. For a 0.5 per cent solution of casein this equation, 

 therefore becomes: 



X X 10^ = 26,880 61 - 951,600 6i2 - 14.49. 



In the following table the experimental and calculated values of 

 X X 10^ are compared — the symbols have the same meaning 

 as in Table XXVIII. 



TABLE XXIX 



For a 1.5 per cent solution of casein equation (vii) becomes: 

 X X 105 = 26,880 61 - 317,200 hi^ - 43.47. 



In the following table the experimental and calculated values 

 of X X 10* are compared: 



TABLE XXX 



