Experiments' in EleSlricity. 457 
from the end of the wood a pencil of ray's diverging to 
the point towards the approaching body, which, I appre- 
hend, demonfixates the conductors to be differently elec- 
trified. 
3. It may alfo be feen by another experiment. I take 
two jars, coated as in the Leyden experiment, and charge 
one by the prime conductor, the other by the anti-con- 
duCtor; the firft will be pofitively, and the fecond nega- 
tively electrified; which is proved by applying a dif— 
charging rod to the balls connected with the infide of 
the jars, when both immediately difcharge themfelves, , 
which they would not do, if both jars were charged from 
the fame conductor. 
Thefie experiments I only mention, to fhew, that the 
two conductors are both electrified, and with this dif- 
ference, that the one has more, the. other lefs, eleCtrical 
matter than in its natural ftate. 
4. When the pole dd is let down by flackening the 
filk line on which it hangs within the fphere of action 
of the two electrified conductors,. and being equally ba*> 
lanced remains in equilibria over both, as foon as the cy- 
linder begins to turn, the pole vibrates regularly towards 
each conductor, and as it approaches the one or the 
other gives a flafh or fpark. 
Xi 3 u 
