Inductive Capacity of Electrolytes. 



11)1 



and July, a scries of measurements of the force on the needle 

 in different liquids was made, in which the following circum- 

 stances were varied in turn : — 



1. Difference of potentials between the electrodes. 



2. Distance between the electrodes. 



3. Rate of alternations of the current. 



4. Conductivity of the liquids. 



5. Temperature. 



1. Variation of Potential : Turpentine, Water, and Alcohol. — 

 In the following tables the numbers in the third column are 

 proportional to the squares of the potentials given in the 

 first column, and the quotients of the deflexions by these 

 squares (column 4) are constant within the limits of experi- 

 mental errors. These nearly constant quotients are, however, 

 slightly smaller in all cases for low potentials. This is 

 doubtless due to the index error of 0*2 volt, which would be 

 appreciable only in the case of the lower potentials. 



Table I. — Turpentine. 



Potentials, V. ! Deflexions. 



10 volts. 



20 



30 



40 



50 



56-7 



•10 cm. 



•41 



•92 

 1C.35 

 2-54 

 3-30 



Squares of 1f .. 



1 



4 



9 

 16 

 25 

 31-15 



Constant Quotients. 



•10 



•1025 



•1022 



•1022 



•1016 



•1027 



Table II.— Water. 



Potentials, V. 



Deflexions. 



V 



Squares of -. 

 o 



Constant Quotients. 



5 volts. 



•35 cm. 



1 



•35 



10 



1-49 



4 



•37 



15 



351 



9 



•390 



20 



(V27 



16 



•392 



25 



993 



25 



•397 



30 



14-20 



3u 



•394 



35 



1945 



49 



•391 



40 



24-80 



04 



•389 



