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Effed ; that is, to the Att'ton of the Caufe, or the 
\ Tower exerted at the Time when the EfFed is pro- 
duced. Tofuppofeany EjfeEt proportional to th t Square 
or Cube of its Caufe , is to fuppofe that an EjfeEl arifes 
partly from its Caufe , and partly from * Nothing . 
In a Body in Motion , there may be conlidered di- 
ftindly, the Quantity of the Matter , and the Velo- 
city of the Motion. The Force ariling from the Quan- 
tity of the Matter as its Caufe , muff necelTariiy be 
proportional to the Quantity of the Matter : And the 
Force ariling from the Velocity of the Motion as its 
Caufe , muft necelTariiy be proportional to the Velocity 
of the Motion. The whole Force therefore ariling 
from thefe two Caufe s, muft necelTariiy be proportio- 
nal to thefe two Caufes taken together. And there- 
fore in Bodies of equal Bignefs andfDenfty , or in one 
and the fame Body , the Quantity of Matter continu- 
ing always the fame, the Force muft necelTariiy be 
always proportional to the Velocity of the Motion. If 
the Force were as the Square of the Velocity, all that 
Bart of the Force , which was above the Broportion* 
of the Velocity , would arife either out of Nothing , or 
(according to Mr. Leibnitz! s Philofophy) out of fome 
* Which is juft like the Suppofition made by thofe Mathematicians, who 
have taken it for granted, that | is equal to Infinite-, that is, that as o 
to 1, fo 1 is to Infinite that is, that Infinite multiplied by o, is equal to 
1, or an infinite Number of Nothings equal to Something ; which is pal- 
pably falfe. The true Proportion is, not as o to 1, fo 1 to Infinite ; but as 
an lnfinitefimal is to 1, fo is 1 to Infinite. And as the Infinitefimal of an 
Infinitefimal (that is, a fecond Fluxion, or the fecond Power of Infinitefimal) 
is. to 1, fo is 1 to Infinity of Infinites, or the fecond Power of Infinite that 
is, (for Inftance) *tis as a finite [phyfical] Line to an Infinite Surface, or as a 
finite [ phyfical ] Surface to an infinite Solid. And as o (which is beyond alt 
Proportion lower than the Infinit'th Power of an Infinitefimal ) is to 1, fo is 1 to 
that which is beyond all Proportion higher than the Infinit'th Power of Infinite. 
Which clearly removes the Foundation of all the ridiculous Confequences, 
which have been drawn from the Suppofition of the fore-mention’d falfe 
Proportion, 
