[ JOO ] 
IX. An Account of fame Eledrical Experiments 
made before the Royal Society on 
Thurfday the \ 6 th of February 17} 7- 8. 
By the Same. 
I 
Experiment I. 
Tab. I. Fig. I. 
I Took the Glafs Tube AB oi two Inches Dia- 
meter, which had at one End Ay a Brafs Ferril 
with a Brim cemented to it, and at the other End 
B, a Brafs Cap clofe at Top, the Brafs-work being 
join’d to it, in order to exhauft it of its Air upon Oc- 
cafion. When this Tube was very dry, it would 
become eleftrical by rubbing, fo as to fnap by paf- 
iing the Ends of the Fingers near it j but that Virtue 
could not be excited in the Tube nearer the Brafs at 
the Ends than from a lob, and not unlefs the Tube 
was very dry within. 
The Tube being thus prepar'd, and having an Ivory 
Ball C, of about two Inches Diameter, tied to it at 
the End B by a fhort String, I paffcd the Tube through 
the horizontally fulpended Plate till it was 
(lopp'd by the Brim at A j and as it hung perpendi- 
cularly, the Ball C was within a Foot and an half of 
the Floor. The Plate was about 10 Inches in 
Diameter, and fufpendedby three fmall Cat-gut Strings 
as Ey €y of about two Feet in Length, all which were 
tied together at E, ro an hempen String hanging 
from the deling at F. 
By 
