(ifij 
4. That hitherto in the nature of Maf- 
ter there is nothing known to us, v^here- 
by the Principle of the Motion, and the 
Perception of Motion may be explicated $ 
but that the determination of Natural 
Motions may be changed from three 
Caufes. 
^ Firfii From the Motion of the Fluid 
permeating all Bodies; and what things 
are this way produced, are faid by Us to 
be produced NMurallj* 
Secondly, From the Motion of Arti’- 
mals 5 and the things that are done this 
way are many of them called Jrtijicid. 
Thirdly, From thedirft and unknown 
Caufe of Motion; and in thofe that are 
done this way, the Pagans thcmfel^cs be¬ 
lieved there was fomething of Divine* 
Certainly to deny to this Caufe a povver 
of producing effeils contrary to the ufu- 
al courfe of Nature, is the fame, as if We 
fliould deny to Man the power of alter¬ 
ing the Courfe of Rivers 5 the power of 
kindling Fire in places, where without it 
it would never be kindled 5 of extingui- 
fliing Light,which clfe would not vanifli 
but by the ceafing of matter v of inocu- 
lacing a twig of one Plant into the branch 
of 
