[• 04 ] 
Siippofition, that they repel one another equally 5 for 
the two contrary Forces of the outer Threads deftroy 
each other, and confequently the middle one mull 
remain quiets but there was nothing to hinder the 
middle one from repelling the two outer on each 
hand fide ways. If, as it often happened, the three 
pendulous Threads did not remain in the fame Plane, 
they then all receded from one another equally, and 
formed nearly a triangular Prifm j the three Threads 
being the three Edges, or rather a triangular Pyramid 
with the Top cut off. 
Upon fufpending four Threads at the fame Diftance 
as before from one another, if they continued in the 
fame Plane, they all parted, but the two outermoft 
more from their Neighbours, than the two in the 
middle from each other. 
If they moved out of the Plane they were firftin, 
they formed two Prifms, each extreme with the two 
in the middle forming one, or rather a Parallelopepid, 
lefs at Top than at Bottom. 
When five Strings were fufpended, either the mid- 
dlemoft continued Stationary when the Plane was 
not altered, or if it was, they formed three Prifms. 
Experiment II. 
I afterwards placed two crofs blue Silks, of the 
fame Length as before, about half an Inch afunder 
from one another horizontally, and tied at each End ; 
and upon each of thefe, at different times, hung two, 
three, four, and five Threads, at the fame Diftances as 
before, when every thing lucceeded, as it ought to 
have done, upon a Suppofition of their mutually 
repelling one another. 
E X- 
