( *8? ) 
of jlprib* and though it had no manner of Clothing 
or Covering, has attrafted ever fince. And in this, 
as in the other Bodies, the Attraction will be accord- 
ing to the Weather ; but when it attracts the ftrong- 
eft, it is not more than the tenth Part of what the 
Cone of Sulphur, that is covered, a tt rafts. 
The manner of obferving thefe Attractions is beft 
performed by holding the Attrafting Body in one 
Hand, and a fine white Thread tied to the End of a 
Stick, in the other j by this means far lefs Degrees 
of Attraction will be perceived, than by making 
ufe of Leaf-Brafs. When the Thread is held at the 
utmoft Cxi (t a nee, it may be attracted j the Motion of 
it is at firlt very flow, but ftill accelerating as it ap- 
proaches nearer to the attracting Body. 
I am now on the Subjeft of permanent Attraction it* 
Glafs, then in the other Bodies, but have not yet cam- 
pleated thofe Experiments, meeting with; more. Inter- 
ruption by the YVeatlier. 
With a fmall Hand Air-Pump that was lent me by 
a Friend, I have made Experiments on feveral, Bodies, 
and find that they will attraft in vacua* and that 
at very nearly the fame Diftance as- in plena* provi- 
ded that the Experiment be made in the fame Receiver 
filled with Air y as will appear hy the following Ex- 
periments. 
There was taken a hollow Glafs Sphere, of fome- 
vvhat more than z $ Inches Diameter, being firft ex- 
cited. It was fufpended by a Loop of Silk, that went 
through a fmall Cork, with, which the Hole in the 
Glafs Ball, by which it was blown, was flopped, 
and by the Loop fufpended on a fmall Hook that 
was skrewed onto the Brafs Wire that came through 
the 
