2^6 ANALYSIS OF THE GALVANIC PILK. 



the power of which could be increased by a greater number 

 of groups. 

 Dutch gilt pa- It would have been too expensive to proceed in that at- 

 P er * tempt wilh silver plates, and I was going to undertake it 



with copper plates, pasting the paper over them, when for- 

 tunately 1 thought of a paper, called Dutch gilt paper, on 

 which a kind of copper is ready laid. At first I did not find 

 the paper of that sort which is plain, but having tried that 

 which is flowered, and finding much effect, I made the fol- 

 lowing experiment. 

 Ixp. 27. Pile Exp. 27. I cut 76 pieces of this paper to the size of my 

 Ini a?nc! PCr zinc P lates > 1'6 inch diameter, and having formed a pile of 

 76 groups, with only the zinc pi ates"separated by the pieces 

 of this paper, the copper side of all of them turned the same 

 way, I found more electric effects at its extremities, than with 

 the former pile of the same number of groups of zinc, silver, 

 a/id wet doth. 



This experiment increased my hope of obtaining a. natural 

 electric machine, not indeed of a great power, but new in 

 experimental philosophy, and which might lead to some 

 farther discovery ; but unluckdy for speed, being sedentary 

 at Windsor, I was not yet informed that, by a mode of ren- 

 dering zinc ductile, thin plates could be obtained of it, 

 which would answer my purpose, since in this use, calcina- 

 Tinjifdiron tion was not to be apprehended. Wishing however to pro- 

 plates & Dutch ceef ] someway in this attempt, and having found, by trial 

 g\ paper. ^.^ ^ condenser, that tinned iron plates had sensibly the 

 same effect aspeivter plates, T procured as many plates of 

 the former, 1*6 inch diameter, as would fill up the two co- 

 lumns of my frame, separated as above by pieces of flowered 

 Dutch gilt paper. There were 400 in each column, thus 

 composing a pile of 800 groups. 

 Exp. 28. This Exp. 28. The first object I shall mention of this experi- 

 pile gave ment strongly corroborates the former conclusions concern- 



but ifo'chemi- ln g tne m °d e °/ action of the Galvanic pile. Though this 

 cal effects. pile bad, at its extremities, greater electric effects, than I 

 have ever seen at those of any pile producing the strongest 

 chemical effects in the glafs tubes with ivater; yet these 

 tubes being applied, there was not the leaft appearance of 

 such effects. 



But 



