^> Mr. Fepj>s's Galvanic Appatatut. 



merits made by Mr. Pepvs on the deflagration of mclals werft" 

 the mod brilliant and fplcndid we ever beheld. 



The troughs were filled with 32 pounds of water mi-xed 

 with two pounds of concentrated nitrous acid. With this 

 charge — 



Iron wires of ^^5 to tTs of an inch in diameter were defla- 

 grated with great fpkndour. A number of the fniall ones 

 twilled together produced fomewhat like a little brulh : a 

 pleafing appearance in deflagration. 



Charcoal of box wood was not only deflagrated at the 

 place of contad, but remained permanently red hot for near 

 two inches in length. 



Lead foil burnt with great vividnefs, becoming red hot» 

 and emitting a fmall volcano or adjutage of red fparks along 

 v^ith the flame. 



Tin foil burnt with great fplendour, with fmoke and 

 fparks. 



Dutch leaf or brafs foil deflagrated vividly, with fmoke 

 and a profufion of fparks. 



Silver leaf burnt with an intenfe vivid green light: no 

 fparks, but much fmoke or fume. 

 • Gold leaf deflagrated with bright white light and fmokfrj 



TinVire, i-eisTith of an inch in diameter, fufed, burnty 

 and oxidated, with great fplendour. 



Platina wire, i-fixteenth of an inch in diameter, became 

 red hot, white, and fufed into globules at tlie contaft. 



Gunpowder, phofphorus, and inflammable fubftancc?, are 

 lnfl:antly fired by contaft with conduttors armed with char- 

 coal. 



The Galvanic power was capable of deflagrating charcoaf, 

 after pafllng through fixteen perfons with wetted hands 

 joined. 



The befl; method of fhovving thefe experiments is by in- 

 troducing into au earthen plate filled with clean mercury, 

 one of the prime conduftors. The other condu6tcr may br 

 then mounted with the feveral fubftances to be tried. Tht 

 leaves and laminre of metal eafily adhere to it by wetting. 

 Wires niav be twifted round it, and will alfo ferve to bind' 

 Other fubitances to it. 



The power of this large trough was fo great as to keep 

 up the deflagrations and combuftiQa witihout inftermiffioft. 



