( 8p ; 
Now whether thefe ^Q\tX2\'Ph£nomna are attributable 
to the Quality of the Lac^ or Vermilion^ (which 1 
take to be the foie Compound of the Wax 5) or, 
whether the Mixtion of both thefe Bodies is abfo- 
lutely neceffary in the Production of thefe Appear- 
ances, is worthy Enquiry. 
A ConUniiatlon of thefe Experiments, 
I have farther purfu’d the Experiments on the Eledrl- 
city of different Bodies in the following manner. 
I caufed two Wooden Cylinders to be Turn’d, of the 
fame Dimenfions as mentioned in the Experiment of the 
Sealing-Wax ; and in the fame manner as in that, I coat- 
ed their outward Surfaces, one with melted Sulphur, the 
other with Colophony or Rofin mixt with Brick-duff, 
(which was put into it on purpofe to bind and make k 
more hard 5 and firff ihe Cylinder, which was cloathedi 
with the melted Flow’ers of Sulphur, I fixt to give Mo- 
tion to it as ufual in Experiments of this kind 5 and af- 
ter my Hand had been held on’t a little while, I caufed 
the Motion to be ffopt, then bringing near it the Hoop 
with Threads, mention’d in former Experiments, the 
Threads were attraCfed and direCfed to its Center, butno' 
thing foftrongly as to the Sealing-Wax. And this upoa 
feveral Tryals was much fhe fame. Then I try’d the Ro- 
fin in the fame manner, and found the EleCfrical Quality 
in that ratch (frongcr than the former: For the Threads- 
were drive 1 towards its Cente*, feemingly with greater 
Vigour than that of the Sealing-Wax ; bu-t the Rofin at 
that time was not quite cold from its being melted. la 
both thefe Experiments the Threads would fly the Ap- 
proach of one’s Finger ^ but if Sealing-Wax or Amber 
were held near them, they would very eagerly fly and 
adhere 
