210 



PROCEEDINGS OF THE AMERICAN ACADEMY. 



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

 The results are pre- 

 sented in detail and in SoD/UM ChlOR/D£. 

 summarized form in *so r 

 Tables X and XI. 

 The concentration is 

 expressed in milli- 

 equivalents per liter. 

 The numbers in the last 

 four columns show the 

 percentage difference 

 between the observed 

 conductivity and that 

 required by the as- 

 sumed linear function, 

 the nature of whose 

 argument (C*, C»A*, 

 etc.) is shown by the 



.40 



*30 



.20 



./o 



£00 



JSO 



600 



650 



700 



7J0 



£00 



Fig ore 9. 



headings. 



TABLE XI. 

 Summary of the Mean Deviations. 



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 



