[ 200 ] 
was made to part with its electricity with more 
difficulty than the outfide received it, the bodies that 
formed the circuit would contract pofitive elcCtricity ; 
and the refult anfwered exaCtly my expectations. 
I alfo concluded, that, making the interruption in 
the middle of the circuit, fince, in this cafe, the 
infide would give, and the outfide receive, with equal 
difficulty, the bodies in the circuit, placed between 
the place of interruption and the infide of the jar, 
would be charged pofitively; and thofe placed be- 
tween the place of interruption and the outfide, 
would be charged negatively j and this alfo was veri- 
fied by experiment. 
In this ftate of things, I found, that I could give 
the infulated circuit what kind of electricity I pleafed, 
provided there was any kind of interruption in fome 
part of the circuit ; and conjecturing that the elec- 
tricity of bodies placed near the circuit would be 
the fame with that of the bodies that compofed it, 
I fometimes placed the rod that fupported the pith 
balls near the circuit, and fometimes introduced it 
into the circuit j and found, that, in both cafes, it 
contracted the fame electricity. This* tended to con- 
firm me in my fuppofition, that the lateral explofion 
was always attended with a giving or receiving of 
eleCtricity, according to the nature of the circuit, and 
the place where it was fituated ; and I again over- 
looked the difproportion between the caufe and the 
effeCt. 
Prefently after this, it occurred to me, that what 
may be called the redundant electricity of the out- 
fide or infide of the jar, feparates from that which is 
in the glafs, and conftitutes the charge, mull have 
fome 
