or Dr. ingenuous z’s Experiments , 1051 
"both cafes, they really aft as conductors of the eledtric 
fluid between the lower furface of the glafs and the bot- 
tom of the box, in order to reftore an equilibrium, as 
upon Dr. franklin’s principles they ought to do; and 
that the eleCtric fluid does not, like the magnetic, abfo- 
Intel y permeate the glafs. 
EXPERIMENT. 
Take a clean, dry, thin phial, about four inches 
long, and one inch in diameter. In the cork of this 
phial fix a fmall loop of very fine iron wire. In the loop 
fufpend another wire, about two inches and an half in 
length, by a fimilar loop; and on the lower end hang a 
light round ball of the pith of elder or cork, and be care- 
ful to give the wire as free a motion as poffible. Let one 
of the ends of a fmall magnetic bar be brought near the 
fide of the phial, and the little ball will inftantly come to 
the glafs, and there remain as long as the magnet is held 
within the diftance of its influence. Remove the mag- 
net, and the ball inftantly retires to, and remains in the 
center of the phial i then dry and warm the glafs, and 
let an electric ftrongly excited be applied to the fide of the 
phial, as the magnet was in the former experiment; the 
6P2 baft 
