Outlines of a View of Galvamfm. 329 



fliicncewhen in contaftwith pure water, which is incapable 

 of ading chemically upon either of the metals ; though 

 wlicn they are connefted with water, holding in folution. 

 nitric acid, or any other fluid decompofable by filver, they 

 form an aftive galvanic arrangement *. 



And zinc and lilver, which a6l very little with pure water, 

 form a powerful combination w^ith water holding in folutioa 

 atmofpheric air or acids t- 



The following table of fome circles of the firft kind, in 

 which the diBcrent fubftances are arranged according to the 

 order of their known galvanic powers, will fhow how inti- 

 mately chemical agencies are related to the produ6lion of 

 galvanifm. 



TAIiLE OF SOME GALVANIC CIRCLES, 



Comprfed of t-iuo fefecl ConduBors and one wiperfc^ 



Condu£for. 



Copper • ^ 

 c 



Silver 



Witli o-old, charcoal. 



filver, copper, tm, 



iron, mercury. 

 . . . . gold, charcoal, 



filver, copper, tin. 

 . . . . gold, filver, 



charcoal. 

 . . . . gf'ld, filver. 

 . goldj filver. 



. . cold. 



! Solutions of nitric 



acid in water, of 



muriatic acid and 



S j )-falphuric acid, &c. 



3 Water holding in lb- 



tj-j, lution oxygen, at- 



.S I j mofphcric air, &c. 



"2 I j Solution of nitrate of 

 Q I filver and mercury. 



[Nitric acid, acetous 



J acid. 

 Nitric acid %• 



The mofl aftive finale circles of the fecond order are thofe 

 in which the two imperfect conductors are capable of exerting 

 different chemical agencies on the perfeft conduilor, at the 

 fame time that they are poflefll-d of power of action on each 

 other. But even circled in which only one of the fluid parts 

 is decompofable by the folid, are poflelTed of power of aftion. 



Thus copper, filver, or lead, a6ts very powerfully when 

 connciHed in the proper order with folutions of alkaline ful- 

 pliurets and of nitrous acid, both of which fluids are pof- 

 felfed of difiindl chemical agencies upon lhem§. And 



» D. t F<Hbr()ni. 



+ Dry nitre, cauftic potafh, unti foda, arc conduftors of L'a'vanifm uhcu 

 rcndertil fluid by a hijih degree of iieat; but the order oi their condudU 

 inf powers hai; not been yet atcertained. 



'§ D. 



copper 



