POTASSIUM SULPHOCYANATE. 



181 



80 



70-1 

 60 



M-4 



I 50^ 



a 

 5 40 



e 



"3 30 

 o 



i i 

 g 20- 



10 



25^ 50 < 75# 1005; 



Percentage of Methyl Alcohol 



FIG. 84. CONDUCTIVITY OF COPPER CHLORIDE IN MIXTURES 

 OF METHYL ALCOHOL AND ETHYL ALCOHOL AT 0. 



2554 50-4 75 # 100 $ 



Percentage of Methyl Alcohol 



FIG. 85. CONDUCTIVITY OF COPPER CHLORIDE IN MIXTURES 

 OF METHYL ALCOHOL AND ETHYL ALCOHOL AT 25. 



POTASSIUM STJLPHOCYANATE. 



The potassium sulphocyanate used in this work was purified in the follow- 

 ing manner : The purest salt obtainable was twice recrystallized from redis- 

 tilled, 95 per cent ethyl alcohol, and then once recrystallized from absolute 

 alcohol. The crystals were drained by suction, and dried at 100. In every 

 case the salt was crystallized in as finely divided condition as possible. The 

 salt was preserved in glass-stoppered bottles, in a sulphuric acid desiccator. 



