102 



SMITHSONIAN" MISCELLANEOUS COLLECTIONS 



VOL. 54 



Mean, 163.8138, ± .00101 



The seven series for the ratio AgCl : Agl, arranged in the order of 

 ascending magnitude, now combine thus : 



Berzelius 163.326, ± .023 



Dumas 163.782, ± .008 



Koethner and Aeuer 163.8070, ± .00057 



Baxter, bromide series 163.8126, ± .00079 



Baxter, direct 163.8138, ± .00101 



Ladenburg, final 163.8237, =t .00103 



Ladenburg, preliminary . . . 163.8278, ± .0048 



General mean 163.8118, ± .00038 



For the ratio Agl : AgBr : : 100 : x there is one set of determinations 

 by Baxter.^ Silver iodide was converted into bromide by heating in 

 bromine vapor. The data are as follows: 



Mean, 79.9799, ± .00028 

 THE POTASSIUM CHLOKIDE-SILVER RATIOS. 



The ratios between silver, potassium chloride and silver chloride have 

 been repeatedly measured. First, let us consider the ratio Ag : KCl : : 

 100 : X. Marignac ^ dissolved pure silver in nitric acid, and determined 

 the ratio by titration with a solution of potassium chloride. The data 

 are as follows: 



^ Proc. .\nier. Acad., 41, 73. Journ. \mcr. Chem. Soc, 27, 878. 1905. 

 ' Oeuvres ComplOtes, 1, 77. 



