IN A CLOSED GALVANIC CIRCUIT. 245 



represents, as before, the relation between the quantity of liquid 

 and intensity of current ; g denotes the per-centage of crystalline 

 salt contained in the solution employed, and the column r con- 

 tains the relative resistances to conduction which the several 

 liquids exert. 



In determining the value — in each case, the mean of several 



experiments, with currents of different intensities i, was taken. 

 The resistances r are taken from those furnished by Becker 

 (Liebig's Annalen, Ixxiii. s. 1). 



According to this, the relation — increases quicker than the 



increase of resistance. 



As additional examples of the increase of quantity with the 

 resistance, distilled water and alcohol may be mentioned ; a gal- 

 vanic current, which produces no visible action upon a solution 

 of sulphate of copper, transports them very visibly. Another proof 

 is furnished by sulphuric acid; it is a good conductor, and 

 it is impossible to effect its transference. If we seek to accomplish 

 this by employing stronger galvanic currents, the violent libe- 

 ration of gas opposes great difficulties to correct observation*. 



The true connexion between the electrical motion of liquids 

 and their peculiar composition, cannot be recognised in the 

 above experiments ; those yet to be described will first esta- 

 blish it. 



* According to this, the increase of the liquid on the platinum plate of a 

 Grove's battery cannot be explained by the galvanic transference of the liquids ; 

 inasmuch as all the liquids employed in that battery are comparatively good 

 conductors. The cause of the phaenomenon must rather be sought in the che- 

 mical processes which take place in the battery. 



