( 2 ) 
Leaf-Gold is firft attrafted by the Tube ; and ac- 
quires an Eieftricity by approaching it ; and of con- 
fequence is immediately repell’d by it. Nor is it 
re-attrafted, while it retains its eleftrick Quality. 
But if, while it is thus fuftain’d in the Air, it 
chance to light on fome other Body, it ftraightways 
lofes its Eieftricity ; and confequently is re-attraft- 
ed by the Tube, which, after having given it a new 
Eieftricity, repels it a fecond time which continues 
as long as the Tube keeps its Eieftricity. Upon ap- 
plying this Principle to the various Experiments of 
Eieftricity, one will be furprized at the Number of 
obfcure and puzzling Fafts it clears up. For 
Mr. Hauksbee’s famous Experiment of the Glafs 
Globe, in which Silk Threads are put, is a necefla- 
ry Confequence of it. When thefe Threads are ran- 
ged in Form of Rays by the Eieftricity of the Sides 
of the Globe, if the Finger be put near the Out- 
fide of the Globe, the Silk Threads within fly from 
it, as is well known ; which happens only be- 
caufe the Finger, or any other Body applied near the 
Glafs Globe, is thereby render’d eleftrical, and con- 
fequently repels the Silk Threads, which are en- 
dow’d with the like Quality. With a little Re- 
fleftion one may in the fame manner account formoft 
of the other Phenomena, and which feem inexpli- 
cable, without attending to this Principle. 
Seventhly , Chance has thrown in my way ano- 
ther Principle, more univerfal and remarkable than 
the preceding one, and which calls a new Light on 
the Subjeft of Eieftricity. This Principle is, that 
there are two diftinft Eleftricities, very different 
from one another-, one of which I call vitreous 
M m Eleffiri, 
