300 On two new Classes cf Galvanic Conductors. 



pile. If the isolallon is perfect, electrometers, when ap- 

 plied to the two point?, will indicate in a few seconds the 

 same state of divergency as if the poles were not in contact 

 with tl)e ilame. If, however, we put one of the flames in 

 communication with the ground, tho eicctrometer of this 

 pole inuTiediutely loses all its divergency, and it passes to the 

 maximum in the electrometer of the opposite pole. The 

 alternate contact of the two flames therefore produces the 

 same effect as if wc lud immediately touched the extremities 

 of the pile itself. 



Lastly, in order to ascertain still more convincingly that 

 flame is a hetter conductor for all the effects of the pile 

 which are not connected with the closing of the circle, we 

 may bend the metallic stalk which surmounts an electrome- 

 ter so as to make the point of it touch an isolated flame 3 we 

 must bring into this same flame a metallic wire coming from 

 one of the poles ; and then, if we touch theopposite.pole, the 

 electrometer will receive througli the flame the maximum of 

 the divergency relative to this case. If we afterwards touch 

 the electrometer itself, the pole at which it communicates, 

 by the intermedium of the flame, is discharged. At least 

 upon touching the flame we discharge at one and the same 

 time both the electrometer of this pole and that which enters 

 into the flame. 



Here there are electrical cfTects of the pile, which flame 

 certainly does not isoiatc. Let us see what is the influence 

 of this same flame, when we apply it simultaneously to the 

 two poles, with the intention of closing by its intermedium 

 the Galvanic circle. 



After having fixed to a very sensible electrometer each 

 pole of a pile well iioiated and composed of about 1 50 couples 

 of silver and zinc, we make to proceed from each pole a 

 metallic wire supported by a stalk perfectly isolating : the ex- 

 tremities of the two wires are brought so near as to enter 

 into the flame at one and the san)e time. Upon an isolating 

 support we then n'ace a spirit of wine lamp, and the experi- 

 ment begins, 'j'he in?tant v/e put the two metallic wires in 

 couimunlcaUOu with the flame, so long as the latter resKains 



isolated. 



