( 2 3 $ ') 
'Horizontal, and the other (fatten’d to and moving 
with it ) inclin’d under the Horizon in an Angle of 
60 degr. ( Fig. 7. ) and by the Defcent of the End B 
of the Radius B C, the Radius C D by its Motion 
caufes the Weight at D, to rife up the Line p P, which 
is in a Plane that ftops the (aid Weight from rifing in 
the Curve D A, that Weight will gain Velocity, and 
in the Beginning of its Rife, it will have twice the 
Velocity of the Weight at B ; and confequently, in- 
ttead of being rais’d, will overpoife, if it be equal 
to the latt mentioned Weight. And this Velocity 
will be fo much the greater, in Proportion as the Angle 
A C D is greater, or as the Plane P p ( along which 
the Weight D mutt rife ) is nearer to the Centre. In- 
deed if the Weight at B, Fig. 5'. could by any Means 
be lifted up to 0 , and move in the Arc 0 b, the End 
would be anfwer’d ; becaufe then the Velocity would 
be diminiflied, and become 0 C, 
Experiment ( Fig. 7. } 
Take the Leaver BCD, whole Brachia are equal 
in Length, bent in an Angle of 120 degr. at C, and 
moveable about that Point as its Centre : In this Cafe, 
Weight of two Pounds hanging at the End B of the 
-horizontal Part of the Leaver, will keep in JLqitilibrio 
a Weight of Four Pounds hanging at the End D. But 
if a Weight of one Pound be laid upon the End D of 
the Leaver, fo that in the Motion of D along the 
Arc p A, this Weight is made to rife up againtt the 
Plane P p ( which divides in half the Line A C equal 
to C B ) the faid Weight will keep in ALquilibrio two 
Pounds at B, as having twice the Velocity of it, when 
the 
