THALLIUM ELECTRODE AND THALLOUS IODIDE. 



203 



TABLE II. 



Conductivity of Thallous Nitrate Solutions at 0°C. 



Extrapolation to infinite dilution, using the method of Noyes ^ 

 both graphically and algebraically (method of least squares), gave the 

 following results: 



Mean 



82.51 



148.96 



According to Noyes and Falk ^° the mobility of the nitrate ion at 25° 

 is 70.6 mhos and at 0° is 40.7 mhos; hence the mobility of the thallous 

 ion at 25°C. is 78.4 and at 0°C. is 41.8. 



9 See G. A. Abbott and W. C. Brav, Jour. Amer. Chem. Soc, 31, 745, and 

 John Johnston, ibid., 1010 (1909); and A. A. Noyes, Carnegie Institution Pub- 

 lication, No. 63 (1907). 



10 A. A. Noyes and K. G. Falk, Jour. Amer. Chem. Soc, 34, 479 (1912). 



