2S£ OK GALVANIC PHENOMENA, 



at their extremities, than the same number of groups of zinc 

 "and silver separated by the wet cloth', however now not the 

 smallest chemical effect was produced in the water of the 

 glass tithes when connecting these extremities, though the 

 gold leaves fell ; a proof of the circulation of the electric fiuid. 

 In p. 250 of the same paper, at exp. 29, begin some trials 

 concerning the comparative electrical effects of the size and 

 number of the groups, on which I had already formed my 

 VoTta's con- judgment, by Sig. Volta having explained to me at Paris, in 

 denser. 1782, the cause of the effect of his admirable instrument 



then lately invented, the condenser, as explained in that pa- 

 Biff rent ef- per; according to which I found, that, for a mere di- 

 fcctsof size and ver zence of the gold leaves, the number only of the groups 

 Huaiber. ■..,.,, , , , . , 



determined it: but that, when they produced some other 



effect; as for instance to strike the sides, and thus be re- 

 duced to the electrical state of the ground', with the same 

 number of groups, the size of the plates had an influence, as 

 they repaired sooner what the gold leaves had lost; which 

 made them strike more frequently in the same time, in pro- 

 portion to the size of the plates. 

 Number of * corae now to tne general results of these experiments, 



yaiis of metals the account of which begins at p. 262 of the same paper; 

 Iffeaofthe wmcn w *ty show what I have above mentioned, with respect 

 sam« number to Dr. Maycock's system, that a certain number of groups, 

 ^contacts oi z i nc an & copper being in mutual contact, and separated by 

 paper, produce sensibly the same electrical effect, as the 

 same number of contacts of one insulated metal, after having 

 been applied to the other while communicating with the 

 ground. I made these experiments with a particular tan- 

 denser, shortly described in my paper, and with plates of the 

 Remits tabu- sarae diameter as those of my column. I have given the 

 !ated. general results of these experiments in some tables, p. 265, 



in all of which, A represents the zinc side, and B the copper 

 side. In these tables, designed to trace the motion of the 

 electric Jluid through the pile\n different circumstances, I 

 have supposed the pile of the new construction, (which I 

 have called electric column) of whatever number of groups, 

 to be divided into eleven equal parts. I have used arbitrary 

 numbers to express the progress of positive and negative, but 

 they are proportional to the whole: I have made these num- 

 bers 



