ANALYSIS OF THE GALVANIC PILE. l$\ 



undergoes by pervading different piles, will become an im- 

 portant object in the course of the conclusions from the 

 above experiments, to w.hich 1 now come. 



The first of these conclusions will concern the fundamen- Electric and 

 tal mode of action of the pile, in its two different effects, ^ m:caI J ef ". 



< / * Itxts produced 



electric and chemical. When I devised the different dissec- by different 

 tions of the pile by small metallic conductors, I expected, S rou P 3 * 

 that it would lead to the discovery of the efficient groups ; 

 this has happened, but in an unexpected manner ; the effi- 

 cient groups are not the same for the electric and chemical 

 effects. For electric effects, the efficient groups consist sim- Electric group; 

 ply of the binary associations of the two metals ; each group 

 being separated from the next by a cow ducting substance non- 

 metallic. 



For chemical effects, the efficient groups are ternary ; they Chemical 

 are composed of the two metals, having between them a li- s 

 quid in contact with both, which here is in the wet cloth 



If Fig. 2 is considered with that view, it will confirm these Both in piles 

 determinations. In the piles, No. 1 and 2, which produce land2: 

 both effects, the two kinds of groups exist. The binary 

 groups of metals, to which are owing the electric effects, 

 are formed, in No. 1, by the immediate contact of the two 

 metals; and. in No. 2, they are produced by the interposi- 

 tion of the brass tripods ; and in both piles, these binary 

 groups are separated by a nonmetallic conducting substance, 

 which is the wet cloth. The condition of chemical effects in 

 the circuit, which is the ternary groups above denned, exist 

 also in these two piles, as in each the ivet cloth is ptaeed be- 

 tween the two metals, in contact with both. 



But the case is different in the piles No. 3 and 4. In the electric only in 

 former indeed, the condition of a motion of the electric ° ' 

 fluid exists, namely, the binary groups of metals, separated 

 . by 'he nonmetallic conducting substance; and ijje elec trie 

 effects continue : but the condition tor chemical effects in the 

 circuit is wanting ; the wet cloth is in contai only with zinc 

 and not with silver ; in aword, it is eot between the two 

 tnetals, which is the condition. 



Lastly, the pile No. 4, which produces neither electric ne ith*i in 4. 

 effects, nor chemical effects in the circuit, is deprived of the 

 conditions of both. The electric effects are not produced, 



K c i because 



