[ 4=9 ] 
But their Antagonifis will reply, That this Princi- 
ple is not admitted by them, except the Times of 
producing thofe EfFetts are equal; and that they are 
not fo in the Cafe before us : For the greater Body 
will take up a longer Time in producing its EfFeft, 
or in bending its Spring. 
If therefore the Leibnitian Party pretend. That 
equal Effe&s, when produced in unequal Times, do 
always arife from equal Caufes, they mult not impofe 
this upon their Opponents by way of Principle or 
Axiom, but mufi demonfirate it. 
Till this be done, there will be Room to doubt, 
at leafi, whether the two Bodies have equal moving 
Forces, though they bend equal Springs to the fame 
Degree. 
For the larger and flower of thefe two Bodies will 
bend the one Spring more (lowly ; and, confequently, 
will be refilled for a longer Time, than the fmaller 
and fwifterBody will be refilled in bending the other 
Spring to the fame Degree. 
May not therefore the total Refinance of a Spring 
be greater, if that Refinance continues for a longer 
Time ? 
And, if the total Refinance be greater, mutt not 
the moving Force, which is defiroyed and confumed 
by that Refinance, be alfo greater ? 
Is there not Reafon then to doubt, whether the 
moving Forces of thefe two Bodies be equal, though 
they bend equal Springs to the fame Degree ? 
In like manner, when a Spring, already bent to 
fome certain Degree, does* by unbending, drive 
before it a Body which gives way to its Prefiure, is 
there not Room to doubt, whether the Prefiure of 
I i i the 
