226 



ELECTROCHEMISTRY 



TABLE XII* 



Sodium Serum-globulinate. Neutral to Litmus. 9.75X10~ 5 Equiv- 

 alents NaOH per gram. Temperature 18 degrees 



A = 17.65 B = 36,200 



* Calculated from experimental data obtained by W. B. Hardy (2). 



The constants determined by least squares (A = 22.23; B = 17,391) do not give, for the smaller 

 values of m, so good an agreement as the above. From the evidence afforded by the numerous 

 data set forth in these tables there is strong presumptive reason for believing that, notwithstanding 

 this lack of agreement, the dilution-law holds good in this case also, and that experimental errors 

 are responsible for the deviations. A very probable source of error in these determinations is, as 

 Hardy points out, the conductivity of the undissolved suspension of globulin, a quantity of very 

 uncertain magnitude and meaning. This conductivity was very appreciable with the globulin 

 employed by Hardy (precipitated by acetic acid), while it was unappreciable with the globulin 

 employed in my experiments (precipitated by CO2). Since the method of least squares fails to 

 yield constants which satisfy the experimental results, I have taken A for this salt to be the same 

 as A for the salt containing 18 X 10~ 5 equivalents NaOH per gram. B is estimated from the first 

 observation. It is evident that the order of agreement between the calculated and observed 

 values is tolerably good. 



TABLE XIII* 



Sodium Serum-globulinate. Neutral to Phenolphthalein. 18X10" 8 

 Equivalents NaOH per gram. Temperature 18 degrees 



A = 17.65 B = 11,500 



* Calculated from the experimental data of W. B. Hardy (2). 



