( 28 ) 
We then thought of trying whether the Attraction 
would not be ftronger without doubling or returning 
the Line, which we found Means of doing in the- 
Barn, where we had a Line of 114 Feet long, four- 
teen Feet of which hung perpendicular from the Silk 
Line ; and now the Attraction was, as we then con- 
cluded, ftronger than when the Line was returned, as 
in the matted Gallery. 
July 3, having now brought with me the great 
Glafs Tube, between Ten and Eleven in the Morning 
we went again into the Bam, carrying with us thefo- 
lid Cane, and repeated the laft mentioned Experiment 
with both the Tube and Cane \ but the Attraction was 
not fo ftrong as in the preceding Evening, nor was there 
fo great a Difference in the Attraction communicated 
by the folid Cane and Glafs Tube, as one would have 
expefted, confidering the Difference of their Lengths 
and Diameters. 
We then proceeded farther, by adding fo much more 
Line as would make a Return to the other End of the 
Barn, the whole Length of the Line being now 293 
Feet \ and though the Line was fo much lengthened, 
' we found no perceivable Difference in the Attraction, 
the Ball attracting as ftrongly as before. This encou- 
raged us to add another Return ; but upon beginning to 
rub the Tube, our Silk Lines broke, being not ftrong 
enough to bear the Weight of the Line, when fhaken 
by the Motion given it by rubbing the Tube. Upon 
this, having brought with me both Brafs and Iron 
Wire, infteadof the Silk we put up final! Iron Wire j 
but this was too weak to bear the Weight of the Line. 
We then took Brafs Wire of a fomewhat larger Size 
than 
