IN A CLOSED GALVANIC CIRCUIT. 243 



plates be immersed at two different places, through each clay 

 partition exactly as much liquid will be transported as if it alone 

 were immersed in the liquid, provided always that in both cases 

 the same intensity of current be employed. Consequently, 

 through the side of the clay partition turned towards the negative 

 pole, exactly the same amount of liquid will pass when the in- 

 tensity of the current remains constant, no matter whether it 

 alone intersect the liquid, or whether between it and the positive 

 pole another equal plate be introduced. This will also be the case 

 if both plates touch each other, or, in other words, if instead of 

 a certain plate another of double its thickness be immersed in 

 the liquid. Hence, with the same intensity of current, the quan- 

 tities of liquid transported in equal times through plates of dif- 

 ferent thicknesses are equal. 



Experiment confirms this conclusion. In the apparatus 

 before described (§ 3), a clay cylinder was placed whose upper 

 denser surface had been previously scraped off; the apparatus 

 was then filled with water, and used as before. It was found 

 that the mean ratio between the quantities of liquid transported 

 by currents of different intensities, to the corresponding inten- 

 sities i themselves, was 



? = l-60. 



t 



After making in a similar manner the sides of the cylinder 

 still thinner, the apparatus was again used as before ; the above 

 ratio had then the value 



— =1'64, 



or nearly the same as when it possessed its original thickness. 



Other experiments gave like results. For example, into the 

 apparatus described in § 2 a clay plate 4*3 millims. in thickness 

 was introduced ; the apparatus was then filled with a solution of 

 sulphate of copper, and the tube g^ replaced by a |~ formed tube, 

 such as that described in § 3 ; a vessel was placed before the 

 efflux tube, so that the quantities of liquid transported by cur- 

 rents of different intensities into the vessel a^ could be measured. 

 The mean ratio of the corresponding intensity of the current 

 to the quantity of liquid transported was 



f = i-87. 



