/ 
( *7 ) 
Feet from the End of the Gallery there was a erofs 
Line that was fixed by its Ends to each Side of the 
Gallery by two Nails ; the middle Part of the Line 
was Silk, the reft at each End Packthread ; then the 
Line to which the Ivory Ball was hung, and by which 
the Ele&rick Vertue was to be conveyed to it from 
the Tube, being eighty Feet and a half in Length, 
was laid on the crofs Silk Line, fo as that the Ball 
hung about nine Feet below it : Then the other End of 
the Line was by a Loop fufpended on the Glafs Cane, 
and the Leaf-Brafs held under the Ball on a Piece of 
white Paper ; when the Tube being rubbed, the Ball 
attracted the Leaf-Brafs, and kept it fufpended on it for 
fome Time. 
This Experiment fucceeding fo well, and the Gal- 
lery not permitting us to go any farther in one Length, 
Mr. JVhefor thought of another Expedient, by which 
we might encreafe the Length of our Line, which was 
by putting up another crofs Line near the other End of 
the Gallery j and over the Silk Part of both the Lines 
there was laid a Line that was long enough to be re- 
turned to the other End, where the Ball hung ; and 
though now both Ends of the Line were at the fame 
End of the Gallery, yet Care was taken that the Tube 
was far enough off from having any Influence upon the 
Leaf-Brafs, except what paffed by.theLine of Commu- 
nication : Then the Cane being rubbed, and the Leaf- 
Brafs held under the Ivory Ball, the Eleftrick Vertue 
paffed by the Line of Communication to the other End 
of the Gallery, and returned back again to the Ivory 
Ball, which attrafted the Leaf-Brafs, and fufpended it as 
before. The whole Length of the Line was 147 Feet. 
D 2 We 
