A 



JOURNAL 



OF 



NATURAL PHILOSOPHY, CHEMISTRY, 



THE ARTS. 



MAY, 1804. 



ARTICLE L 



Letter from C. Wilkinson, Efq. on the Means of fitiipUfying 

 and improving the Galvanic Apparatus. 



To Mr. NICHOLSON. 

 SIR, 



JL HE communication from your ingenious correfpondent Introdu£lIon» 

 I. R. I. aflbrded me confiderable pleafure. As you favoured 

 rae with his idea how the galvanic power may be increafed 

 to an immenfe degree, prior to its appearance in your valuable 

 Journal, I have been induced to refle6t upon various modes 

 of galvanic arrangements. 



If the whole apparatus be made to confift only of a fingle In apparatus of 

 plate reflected backwards and forwards, fo as to expofe an °"^ ^'"^'.^ P'^^*» 

 immenfe furface, no plate of copper would be required, only copper isun- 

 taking care, which in this inllance would be eafily efFe6led| '^eceffary. 

 that one fide of the plate only fliould be expofed to the aftion 

 of the acid. For, from various experiments, I am perfuaded 

 that the other metal anfwers no other ele61rical purpofe, than 

 to guard and proteft the zinc fide, to which it is foldered from 

 being aded upon by the acid. Even cement anfwers very Cement will do 

 well, if we only preferve through the cement a good con- '^ "^^'* 

 dueling medium to the zinc. Thus with a zinc plate of eight 

 inches diameter, if only a piece of copper the fize of a half- 

 VoL. Vm.—MAY, 180k B penny 



