[ 3§4 ] 
had got feeble hold of them : but this was no more 
than what I found took place between them, when, 
without being electrified, they were forced clofe toge- 
ther. For that reafon, two plates of glafs, finely 
polifhed, and fo even as to come into clofe contaCt 
through the whole extent of their oppofed furfaces, 
would be very improper for this experiment} for, 
when the power of eleCtricity had forced them into 
contadt, the preffure of the air, and a cohefion pro- 
ceeding from another principle, would keep them to- 
gether. 
But to purfuethe purpofeof our experiment. — All 
who admit of the diftinCtion of electricity into two 
kinds, agree, that as in the Leyden phial, fo likewife 
in the eleCtrical pane, the different fides are differently 
electrified : That fide, which more immediately re- 
ceives its eleCtricity from the glafs globe, is faid to be 
politively, and the other negatively, electrified. What 
may be faid of the eleCtrical pane, is applicable to the 
glafs plates in this experiment ; for, when they are put 
together in the manner mentioned above, they form 
an eleCtrical pane between them ; one of the plates 
correfponding with one of the fides, and the other 
with the other fide of the pane. When, therefore, 
the glafs plates are electrified in the manner before 
defcribed, the plate, which receives its eleCtricity im- 
mediately from the chain, will, according to this di- 
ftinCtion, be pofitively electrified, and that which 
receives its eleCtricity from the wire, negatively. 
Upon thefe confiderations, we may expeCt, from 
the experiment in hand, the means of determining, 
whether the diftinCtion of eleCtricity into two differ- 
ent kinds is merely nominal, or if there is an effential 
difference 
