[ '05 ] 
PROPOSITION If. 
Two or more Bodies made eleBrical by communi- 
cating with an EleBrical Body, excited by Fric- 
tion, are in a State of Repulpon with regard to 
one another j or Bodies made eleSirigal by Commu- 
nication, repel one another. 
Experiment I. 
I fufpended two Pieces of white Thread, each 
about ono Foot long, by Loops, upon an horizontal 
blue hlk Line four Feet long, about half an Inch 
afunder from each other ; and upon holding the ex- 
cited Tube over them at a little Diftance, the two 
Threads immediately receded from each other confi- 
derably at the Bottom. 1 then removed one of the 
Threads, and held the Tube over the other, in the 
fame manner as before. The fingle Thread was not 
obferved to move to either Side? confequently the 
moving of the Threads fide-ways was occafioned 
neither by the Attraftion of the crofs Line, nor that 
of the Tube, nor by the Frame of Wood, to which 
the crofs Line was tied at each End, but only by their 
Adion upon each other. 
I then added a third String, at the fame Diftance 
from the fecond, that the fecond was from the firft, 
and upon holding the excited Tube over the middle 
one, at the fame Diftance from the crofs Silk I did 
before, if the Strings continued in the fame Plane, 
the middle one ftood ftill, and the String on each 
fide of it receded confiderably at the bottom Parr, 
which in this Cafe muft neceftarily happen upon a 
Sup- 
