( *9 ) 
than that of Iron. This fupported our Line of Com- 
munication ; but though the Tube was well rubbed, 
yet there was not the leaft Motion or Attraction gi- 
ven by the Ball, neither with the great Tube, which 
we made ufe of when we found the fmall folid Cane 
to be ineffectual : By which we were now convinced, 
that the Succefs we had before, depended upon the 
Lines that fupported the Line of Communication, be- 
ing Silk, and not upon their being fmall, as before 
Trial I imagined it might be ; the fame Effed happen- 
ing here as it did when the Line that is to convey the 
Eledrick Vertue is fupported by Packthread ; viz. that 
when the Effluvia come to the Wire or Packthread 
that fupports the Line, it paffes by them to the Tim- 
ber, to which each End of them is fixed, and fo goes 
no farther forward in the Line that is to carry it to the 
Ivory Ball. 
Finding that our Silk Threads were too weak to bear 
many Returns of Line, Mr. IVheler thought of another 
Way of managing them, fo that fewer Returns might be 
upon each Silk Line ; which was by placing two other 
crofs Lines fotne Feet below the upper ones ; fo that 
every other Turn of Line was fufpended by the lower 
crofs Line. By this Means there was but half the 
Weight of Line upon each Silk, of what there was 
when only two crofs Lines were made ufe of as be- 
fore. By this Contrivance, we could add a much 
greater Length of Line, without Danger of breaking 
our Silk. We then put up a Line that was 666 Feet 
in Length, by eight Returns : Then the Leaf-Brafs be- 
ing held on a Piece of white Paper under the Ivory 
Ball, and the Tube, with the otherEnd of the Line 
i fufpended , 
