210 



PROCEEDINGS OF THE AMERICAN ACADEMY. 



soo 



sSSO 



600 



6S0 



700 



7S0 



FiGDKE 9. 



also of those for the two more dilute solutions opposite and nearly equal. 

 The results are pre- 

 sented in detail and in SoD/i/M C/^l0R/D£: 

 summarized form in 

 Tables X and XI. 

 The concentration is 

 expressed in milli- 

 equivalents per liter. 

 The numbers in the last 

 four columns show the 

 percentage diiference 

 between the observed 

 conductivity and that 

 required by the as- 

 sumed linear function, 

 the nature of whose 

 argument (Ci, CsA*, 

 etc.) is shown by the 

 headings. 



TABLE XI. 

 Summary of the Mean Deviations. 



eoo 



An examination of Table XI leads to the following conclusions : 

 All four formulas express fairly well the results with sodium chloride at 

 18°; but the formulas of van't Hoff and of Rudolphi do not apply well 



