204 



JONES AND SCHUMB. 



The equivalent conductances and degrees of dissociation of thallous 

 nitrate solutions at round concentrations deduced from the above 

 data by interpolation over small intervals are shown in the following 

 table : 



TABLE III. 

 Equivalent Conductance and Degree of Dissociation of Thallous 



Nitrate Solutions. 



Section 2. The Conductivity of Saturated Solutions of Thallous 

 Chloride and of Thallous Iodide at 25°C. and 0°C. and the Solubility 

 of these Salts. - 



For the interpretation of the electromotive force measurements to 

 be described in the next section a knowledge of the concentration of 

 the ions in saturated solutions of thallous iodide and of thallous 

 chloride at 0°C. and at 25°C. is required. Measurements were there- 

 fore made of the conductivity of the saturated solutions, from which 

 the concentrations of the ions have been computed by the aid of the 

 mobility of the ions which had been determined for the purpose 

 (see Section 1). 



The total solubility of thallous chloride at 25° has been determined 

 by several experimenters with good agreement in results. Berkeley's ^^ 

 results over a range of temperature extending from 0° to 100° have been 

 plotted in a curve, from which the values for 25° and 0° may be de- 

 termined by interpolation. His values for the two temperatures, 



11 Earl of Berkeley, Phil. Trans., 203A, 208 (1904). 



