26S M. G. Quincke on Electrolysis, and the 



In these experiments^ as well as in those of § 58, the deflec- 

 tion or difference of potentials was smaller the more the specific 

 con ducting-power of the liquid was increased by the solution of 

 the glass in the water and thereby the resistance of the inter- 

 posed column of liquid diminished. 



§60. 



In the previous experiments the resistance of the battery was 

 very small as compared with the resistance of the part of the 

 circuit whose ends were connected with the pairs of quadrants 

 of the electrometer. In future this shall not be the case. 



If nGc is the electromotive force of a Grove's battery of n ele- 

 ments, K the resistance of the circuit and of the conducting- 

 wires which convey the current of the intensity J to a metallic or 

 liquid resistance W, and if U and V represent the value of the 

 potential of free electricity at the beginning and end of a con- 

 ductor of the resistance W, then 



_^zG___U-V 



.~ u+w" w ^^ 



For a conductor of the resistance w we should have, with the 

 same circuit and analogous notation, 



'~R + i(;-"^' ^^^ 



or, from these two equations, 



„_,= (U-V) ^ (3) 



w 



Calling the difference of potentials for an open circuit Uq— Vq 

 corresponding to the resistance "\V = go , then 



— (U„-V„)j^ (4) 



The resistance U in the circuit may be determined in the usual 

 manner, by observation of the current-intensities i and J on a 

 galvanometer, from the equation 



^-^w='. — ^ (W— w.-), 



provided W and w are known in mercury units. 



To test the accuracy of the method of observation, a Grove's 

 battery of six elements was closed by the resistances given in the 



