( *o ) 
I never till now tried the Experiment, not imagining 
the Tube could have fo great and wonderful an Influ- 
ence, as to caufe them to attrad with fo much -Force, 
or that the Attradion would be carried to fuch prodi- 
giousDiftances, as will be found in the Sequel of this 
Difcourfe. 
Before I proceed to the Experiments, it may be ne- 
celfary to give a Defcription of the Tube : Its Length is 
three Feet five Inches, and near one Inch two Tenths 
in Diameter : I give the mean Dimenfions, the Tube 
being larger at each End than in the Middle, the Bore 
about one Inch. To each End I fitted a Cork, to keep 
the Duft out when theTube was not in ufe. 
The firfl Experiment I made, was to fee if I could 
find any Difference in its Attradion, when the Tube 
was flopped at both Ends by the Corks, or when left 
open, but could perceive no fenfible Difference • but 
upon holding a Down-Feather over againfl the upper 
End of the Tube, I found that it would go to the 
Cork, being attraded and repelled by it, as by the 
Tube when it had been excited by rubbing. I then 
held the Feather over againfl the flat End of the Cork 
which attraded and repelled many Times together ; at 
which I was much furprized, and concluded that there 
was certainly an attradive Vertue communicated to the 
Cork by the excited Tube. 
Having by me an Ivory Ball of about one Inch 
three Tenths Diameter, with a Hole through it, this 
I fixed upon a Fir-Stick about four Inches long, thruft- 
ing the other End into the Cork, and upon rubbing the 
Tube, found that the Ball attracted and repelled the 
Feather with more Vigour than the Cork had done, 
repeat- 
