[ 90 * ] 
markable experiments related in the treatife publilhed 
by Dr.Hoadly and myfelf. Seep. 27 to 34, and 46, 47. 
Jnftead of electrifying the infide of the bottle, in 
the laft experiment, plus , I electrified it minus , with 
the prepared wood, without any other change of cir- 
cumftances. In this cafe, the outfide of the bottle 
was plus , as ufual, and the poker minus . The fluid, 
therefore, which caufed the plus electricity on the 
outfide of the bottle, muft, in part at leaft, have 
flowed from the poker j becaufe there was no other 
open communication with the outfide of the bottle 
and the earth to fupply it. 
With a cylinder of baked wood, which {hewed 
ftronger figns of electricity, than I have yet been able 
to produce from glafs, the balls hanging to the ivory 
were electrified minus , at the diftance of four feet, or 
more, by holding the cylinder over the middle of the 
ivory, and continuing it there : and on moving it 
nearer, they were more ftrongly electrified minus j 
but the fame cylinder, on removing it back again to 
the diftance of two or three feet, or more, electrified 
the balls plus. 
When another conductor, for inftance metal, with- 
out edges or points, was ufed inftead of the ivory, and 
without any thing hanging from it, the fame cylinder 
held over the metal, as was done in the laft experi- 
ment over the ivory, at the diftance of two feet, pro- 
duced a plus electricity : and this was rendered weaker, 
as the cylinder was moved nearer ; but by leflening 
the diftance to about one foot, the minus electricity 
took place. 
In thefe cafes, the plus appearance arofe from the 
earth, air, or other neighbouring bodies. 
y Z a Whew 
