( 3^4 ) 
living Soul effentially belonging to every *P article of 
Matter . 
Whenever any Effect whatfoever, is in a duplicate 
\ Proportion , or as the Square of any Caufe ^ his al- 
ways either becaufe there are two Qaufes acting at the 
fame Time , or that fame Caufe continues 
to aft for a double Quantity of Time. 
The Reflftence made to a Body moving in any fluid 
Medium , is in a duplicate Proportion to the Velocity 
of its Motion * becaufe, in Proportion to its Velocity, 
it is refilled by a greater Number of T articles in the 
fame Time \ and again, in Proportion to its Velocity . , 
his refitted by the fame T articles fingly with a great - 
_er Force , as being to be moved out of their Places 
with greater Velocity. 
Light decreafes in a duplicate Propartion of its Di- 
ftance from the Sun ; becaufe the Rays divaricate ac- 
cording to two Dimenfions ^ according to the Dimen- 
(ion upwards or downwards , and according to the Di- 
menfion flde-ways. But according to the third Dimen* 
(ion forwards from the Sun, a Ray of Light undergoes 
no Alteration ; becaufe the Particles, of which it con- 
(itts, being emitted all of them with an equal Velocity, 
continue every where at an equal Diftance from each 
other. 
One and the fame Caufe, afting in a double Quan- 
tity of Time, produces the fame Effeft, as two equal 
Caufes afting in a Jingle Quantity of Time. One and 
the fame Force , in two Parts of Time, will caufe a 
Body in Motion to defcribe the fame Space , as double 
the Force would do in one Part of Time. The Space 
defcribed therefore by a Body in Motion , is not as the 
force ; but as the Force and the Time taken together. 
~ A 
