C *«3 ] 
Experiment III. 
Five glafs Receivers placed one within another 
upon an eledrical Cement of Bees-wax and Venice 
Turpentine, were all exhaufted : In the innermoft a 
fine white Thread about five Inches long, was fufpend- 
ed from the Crown of it, by the AfUftance of a little 
Cement made of Bees-wax and Oil. Upon moving 
the excited Tube up and down near the Side of,^ and 
horizontally to and from the outward Receiver, the 
fufpended Thread manifeftly made many Vibrations 
correfponding to the Motions of the Tube. 
Experiment IV. 
An eledlrical circular Cake of Bees-wax and Rofin, 
ten Inches in Diameter, was placed horizontally upon 
a tall glafs Receiver near three Feet high, fuch as is 
made ufe of for the dropping the Feather and Guinea. 
ThiS'Cake being, the preceding Evening about Eight 
o’clock, warmed with an hot Iron held over it, and 
then ftruck perpendicularly all over its Surface with 
the Hands in parallel Diredions, and fo left cover’d 
with a thin Pafteboard, was about Twelve o’Clock next 
Day at Noon gently uncover’d, and an ivory Ball 
about one Inch and half Diameter placed in the 
Centre, a fine white Thread about ten Inches long, 
withafmall Piece of Cork, the Size of a Pin’s Plead, 
at the End of it, being held between the Finger and 
Thumb, was gently let down upon the Vertex of the 
Ball j it firft flew off at fome Diftance, and then made 
fcvcral pretty regular Revolutions from Weft to Eaft 
about it, in the Form of a Circle. 
P 
Ex- 
