C 2 2 3 ] 
and that there is fuch a conftant Current of the elec- 
trical Effluvia, is evident, from thofe fmall Streams of 
Light, vifible at the two Corners of the Silver next 
the Plates. If therefore the Globe fhould be flop- 
ped, or the under Plate by any means become elec- 
trical, thefe Proportions would be thereby deftroy’d, 
and the Leaf-Silver would ceafe to be fufpended. 
That the Leaf-Silver is always nearer to the non- 
electrical than to the electrified Plate, is owing to 
its receiving its Supply of Effluvia from the Atmo- 
fphere furrounding the electrified Plate: For as the 
Plate is more ftrongly electrified than the Silver, its 
Atmofphere of Effluvia will be denfer to a greater 
Diftance than that furrounding the Leaf-Silver, and 
therefore can fupply an equal Quantity at a greater 
Diftance than what the lower Plate can receive from 
the Silver, whofe Atmofphere is rarer j and there- 
fore, as the Silver will always be fufpended in that 
Part where the two Currents are equal, without 
which 1 have already fhewn the Proportion would 
be deftroy'd, it will confequently be always nearer 
to the non-electrical than to the electrified Plate. 
If the Experiment is reverfed, by electrifying the 
under Plate, and making the upper one the Non- 
electric, the only Difference will be, that the Gra- 
vity of the Silver muft then be added to the Attrac- 
tion of the electrified Plate, apd will therefore caufe 
the Silver either to be nearer the non-electrical one, 
or the Plates to be moved a little farther afunder, 
or perhaps both. 
I (ball not at prefent prefume to take up any 
more of the Time of this illuflrious Society ; hoping 
that 
