( '*7 ) 
nor to the Aris defcribed by the Weights or their 
Points of Sufpenfion. Therefore it is not a general 
Rule, that Weights aB in Proportion to their Di- 
Jlances from the Center of Motion ; but a Corollary 
of the general Rule, that Weights aB in Proportion 
to their true Velocities , which is only true in fome 
Cafes. Therefore we mull not take this Cafe as a 
Principle, which moll Workmen do, and all thofe 
People which make Attempts to find the perpetual 
Motion , as I have more amply {hewn in the Philofo • 
phical franfaBion, N° 369. 
But to make this evident even in the Balance, we 
need only take Notice of the following Experiment, 
Fig. i. ACB EKD is a Balance in the Form of a 
Parallelogram palling thro’ a Slit in the upright Piece 
N O Handing on the Pedeftal M, fo as to be movable 
upon the Center Pins C and K. To the upright Pieces 
A D and BE of this Balance are fix’d at right Angles, 
the horizontal Pieces F G and H I. That the equal 
Weights P, W, muft keep each other in ^Equilibria , 
is evident \ but it does not at firft appear fo plainly, 
that if W be removed to V, being fufpended at 6 , yet 
it lhall Hill keep P in ^Equilibria ; tho’ the Experi- 
ment fhews it. Nay, if W be fucceflively moved to 
any of -the Points 1, 1, 3, E, 4, f, or 6 , the VEqui- 
librium will be continued ; or if, W hanging at- any 
of thofe Points, P be fucceflively mov’d to D or any 
of the Points of Sufpenfion on the crofs Piece F G, 
P will at any of thofe Places make an VEqulibrium 
with W„ Now when the Weights are at P and V, 
if the lead Weight that is capable to overcome the 
Friction at the Points of Sufpenfion, C and K be ad- 
R % ded 
