IqQ analysis of the galvanic pile. 



Second dissection of the pile* 



Fxp. 5. In this pile, represented at fig. 2, No. 3, the tripods se- 



Ihemctasin p arate g r0U p S composed of the two metals in mutual con* 



wet cloth tact, and the wet cloth in contact with only the zinc plates, 

 touching the _, " ... _ .. , . . _ . . ,. 



jinconly. Exp, 5. — 1. 1 he free pile had the same electric indica- 



tions* 



2. There was no shock produced. 



3. The glass tubes being applied, the electric indications 

 ceased absolutely at the extremities of the pile, a proof that 

 the circulation of the electric fluid was produced ; however 

 no chemical effect appeared in the water, 



4. The condenser being applied to the points a, c, b, 

 no retardation was manifested in the course of the fluid. 



This experiment begins to show, that the causes of pro- 

 duction of electric and chpmical effects, by the pile, are dif- 

 ferent; since here the former continue, but the latter are 

 not produced. 



Third dissection of the pile, 



Exp. 6. This dissection is represented at fig. 2, No. 4 : the tripods 



Metals in con- nere divide the pile into groups composed of the two metals 



tact the wet 



cloth touching in mutual contact, but the wet cloth in contact only with 



the zinc only, silver. 



Exp. 6. Cessation of every effect : no electric sign at 

 the extremity of the^ra? pile; no chemical effect in the glass 

 tubes when connected with it; no electric sign at the points 

 a, c, b. 



Before I come to the conclusions, concerning the mode of 

 action of the pile, which may be derived from this first set 

 of experiments, in which the pieces of cloth were imbibed 

 with only pure water, and no shock was produced, I shall 

 relate the second set of experiments, in which a strong so- 

 lution of marine salt was used ; as all the results, except 

 with respect to the shock, remaining the same, their union 

 will render the conclusions more certain. 



IL Set 



