520 Mr. henly’s Experiments and 
manner as to let the balls hang about the eightn part of 
an inch higher than the plate of brafs on which the ex- 
cited plate of wax was laid, I electrified the balls of a 
pofitively, and the balls of b negatively, lb as to diverge 
about an inch; I- then brought the infulated apparatus 
as near , as I could to the balls, without affeCting either, 
(the brafs plate might then be at nearly an inch and an 
half diftance from the neared ball, both of a and b) ; 
>then, fuddenly removing the excited wax, the balls of 
b inftantly flew to the brafs plate, and thole of a were, 
at the fame inflant, repelled to as great a diftance from 
it. The apparatus having remained in this lituation lbrne 
feconds, on withdrawing the ftand with the brafs plate, 
8cc. the balls of b clofed, having received by this procels 
the quantity of electricity they had before been deprived 
of; but the balls of a lfill remained leparate, as wide as 
iever. 
Experiment 5. Having replaced the excited wax, &c. 
upon the brafs plate, I again electrified the balls of a 
and b, as in the former experiment, viz . tliofe of a poll- 
lively, and thofe of b negatively. I then took a fmall 
phial, properly prepared for the Leyden experiment, 
containing only about three fquare inches of coated fur- 
face; then, prefenting the knob, on the wire of the 
phial, to the plate of brafs, I removed the wax, £kc. and 
inftantly law a ftrong lpark between the brals plate and 
the knob of the phial : when, prefenting that knob 
towards the balls of a, they were conbdcrably repelled; 
but on prefenting it toward thofe of b, they were as 
much attracted. I have made leveral other experiments 
with this apparatus; but, as they all agree with thofe 
above 
