THALLIUM ELECTRODE AND THALLOUS IODIDE. 



215 



existence of solid solutions, formed, on the one hand, by Tl2Hg5 with 

 both excess of thallium and excess of mercury, and on the other hand 

 by thallium and mercury. 



30 40 SO 60 70 



/ao 



Figure 2. Triangles indicate values of Kurnakow and Puschin; black 

 circles, those of Richards and Daniels; white circles, those of Roos; crosses, 

 those of Sucheni. 



