114 



PROCEEDINGS OF THE AMERICAN ACADEMY. 



rection ought to be applied for a possible difference of log P in nitrate 

 and chloride solutions ; but as this value is not accurately determined 

 I will first calculate the solubilities on the basis of the assumption that 

 log PNO3 =log Pci.* We find, from Table XIII., 



log Pci — log PBr =0.080, and log Pci— log P, = 0.152 volt. 



These values are to be subtracted from the electromotive forces 

 observed with AgBr and Agl in order to get the term ^called for 

 by the formula. In Tables XIV. -XVI. I give the results of these 

 calculations. 



In the first column are the values iov p^ ; in the second, for p^ ; in the 

 third, the electromotive forces ; in the fourth, the solubilities as calcu- 

 lated by Goodwin ; in the fifth, the solubilities as calculated by myself 

 under the assumption that log PN03 = log Pci : and in the sixth, the 

 values if one assumes that log PnOs — log Pci = 0.03 volt. I also 

 give the solubilities found b}^ Kohlrausch and Rose,t and by Holle- 

 man % with the conductivity method. 



TABLE XIV.§ 



It will be seen that the second column of solubilities agrees much 

 better with the results obtained bv other investigators than the solu- 



* Tlie term log Pci denotes the value of log P for the metal under discussion 

 when in a chloride solution. 



t Zeitschr. f. ph. Ch., XII. 824, 1893. 



t Ibid., XII. 125. 



§ S, and So in this table should be identical, as they are calculated from the 

 same data by the same formula; the variations are due to errors in calculation. 



