Thermo-electric Action of Metals in Electrolytes. 277 

 Table XIV. Influence of Strength of Liquid on Voltaic Potential. 



liquids (see Tables I and IV) ; when therefore a combination in which 

 the volta-positive metal is thermo-negative, and the negative one is 

 thermo-positive, is heated, the electric potential tends to diminish, 

 notwithstanding that the internal resistance usually decreased. The 

 following are selected cases of this kind, the data of which are 

 derived from comparison of Tables III and VI with Table X, pp. 257, 

 262, and 266 ; a large number of additional ones might be obtained by 

 the same method. The amounts of decrease are for a difference of 

 temperature of 100, ranging from 60 to 160 F. 



Table XV. Influence of Temperature on Voltaic Potential. 



Metals. Liquids. Volt. 



Pb + and Ni in MgS0 4 (weak solution) .... '1876 decrease. 



Mg+ Cd- KHO .... -2046 



Mg+ Sn- KCy .... "2518 



Al + Ag KHO (strong solution) '2484 



Cd + Sn - KI .... -2998 



Mg+ Ag- KF .... -3028 



Mg+ Sn- Na 2 HP0 4 .... "5894 



